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The Biology 120 Peer Mentors and Student Learning Services Present:
Biology 120 Mock Final Examination
Monday, April 3rd, 2017
Time: 6:00 pm
Location: ARTS 241
Important note: This mock final exam was written by your Biology 120 Peer Mentors. It is designed to
help you test yourself on topics and concepts covered in class; it is not a preview of the final exam.
You are required to remain in your seat for 30 minutes. No talking and no use of any electronic devices.
This exam consists of 100 questions. Carefully read the questions and all possible answers and choose
the best answer. Only select one answer per question.
We encourage you to take note of your start and finish time, or to keep track of how many questions
you were able to complete. This may help you to better judge your time for the final exam.
Start Time: ________________
End Time: ________________
Questions completed: ___________
You are invited to return to ARTS 241 at ~7:00 for a Question and Answer period with your Peer
Mentors.
NOTE: This version of the review has been revised.
Revision(s):
• Q30: Wrong answer was given as correct
• Q54: Typo fixed
• Q59: “transcribed” changed to “replicated” to be more correct
• Q69: Wrong answer was given as correct
• Q82: “Transcribed” changed to “translated” to be more correct
• Q87: Duplicated question was replaced
Structured Study Session information
Mondays 2:00-3:20pm – Room 104 in the Arts Building (Mars)
Tuesdays 8:30am-9:50am – Room 213 in the Arts Library (Dakoda)
Tuesdays 5:30-6:50pm – Room G3 in the Murray Library (Maryam)
Wednesdays 11:30am-12:50pm – Room 211 in the Arts Building (Alexa)
Thursdays 11:30am-12:50pm – Room 124 in the Biology Building (Hayley)
Thursdays 3:00-4:20pm – Room 104 in the Arts Building (Tara)
Biology 120 Mock Final Exam, April 2017
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1. Which of the following do NOT carry out glycolysis?
a) Anaerobic bacteria
b) Plants
c) Animals
d) All of the above carry out glycolysis
2. Facultative and strict anaerobes differ in that:
a) facultative anaerobes require a steady oxygen supply, while strict anaerobes require an
oxygen-free environment
b) facultative anaerobes have a greater number of energy producing organelles
c) facultative anaerobes can function with or without oxygen, while strict anaerobes can only
function in the absence of oxygen
d) there is no difference
3. In DNA replication, the ______________ strand grows ____________ away from the replication
fork.
a) Lagging strand, continuously
b) Lagging strand, discontinuously
c) Leading strand, continuously
d) Leading strand, discontinuously
4. In hamsters, brown fur (B) is dominant to white fur (b), and straight fur (S) is dominant to curly fur
(s). If you buy a brown hamster with straight fur, what kind of cross could you perform to determine
its genotype?
a) A dihybrid cross with a brown and straight furred hamster
b) A test cross with a curly haired, white hamster
c) A test cross with another unknown hamster
d) A monohybrid cross with a white furred hamster
5. The creation of ATP in the Glycolysis pathway is known as _________ because of which of the
following reasons?
a) Substrate level phosphorylation; because Oxygen is required to accept the final electrons
to allow the creation of a proton (H+) gradient that drives the synthesis of ATP by ATP
Synthase
b) Substrate level phosphorylation; because ATP synthesis occurs when a reaction releases
enough energy to enzymatically transfer a phosphate to an ADP molecule
c) Oxidative phosphorylation; because ATP synthesis occurs when a reaction releases
enough energy to physically transfer a phosphate to an ADP molecule
d) Oxidative phosphorylation; because Oxygen is required to accept the final electrons to
allow the creation of a proton (H+) gradient that drives the synthesis of ATP by ATP
Synthase
6. A red sunflower is crossed with a yellow sunflower (both true breeding) and all of their offspring
have both solid red and solid yellow petals on the same flowers. This is an example of which of the
following types of inheritance:
a) Codominance
b) Incomplete dominance
c) Complete Dominance
d) Epistasis
7. ________ is transcribed from DNA, __________ has an anticodon and carries a specific amino acid,
and ______ composes ribosomes.
a) rRNA; tRNA; mRNA
b) mRNA; tRNA; rRNA
c) mRNA; rRNA; tRNA
d) tRNA; mRNA; rRNA
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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8. One molecule of NADH in the Electron Transport Chain results in:
a) 1 molecule of ATP
b) 3 molecules of ATP
c) 38 molecules of ATP
d) 0 molecules of ATP
9. Over break, you run out of homework and decide to do an experiment for fun. You gather 3 pieces
of celery from the fridge, 3 bowls from the cupboard, and some table salt. You then fill the first bowl
with distilled water, the second with a dilute salt solution, and the third with a concentrated salt
solution. Finally, you place one celery stalk in each bowl and leave them there for several hours.
When you remove the celery, what are you most likely going to find?
a) The celery from the first bowl is going to be the most limp, the celery from the third bowl
is going to be the most firm
b) The celery from the first bowl is going to be the most firm, the celery from the third bowl
is going to be the most limp
c) There will not be much observable change in any of the celery stalks
d) You can’t tell unless you know the salt concentrations of the second and third bowls
10. You leave all the bowls and celery where they are, and when your mother gets home from work she
asks why the heck there are bowls of water and celery on the counter. You explain that you are
doing science. What can you tell her about your experiment?
a) You are studying the effects of diffusion on the salt content of plant cells
b) You are studying the effects of osmosis on the rigidity of plant cells
c) You are studying the effects of active transport on the water content of plant cells
d) You just really like celery, okay?
11. During cellular respiration, the Electron Transport Chain builds a proton gradient across_________
in eukaryotes.
a) the cell membrane
b) the inner mitochondrial membrane
c) the outer mitochondrial membrane
d) the thylakoid membrane
12. Which of the following correctly outlines the order of events during cellular respiration?
a) Glycolysis, oxidative phosphorylation, citric acid cycle
b) Glycolysis, citric acid cycle, substrate level phosphorylation
c) Glycolysis, citric acid cycle, oxidative phosphorylation
d) Citric acid cycle, Glycolysis, oxidation phosphorylation
13. Which mode of inheritance best describes the trait below?
Unaffected Male
Unaffected Female
Affected Male
Affected Female
a)
b)
c)
d)
Autosomal dominant
X-linked recessive
Autosomal recessive
Y-linked recessive
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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14. Which of the following differences between DNA and RNA are true?
a) DNA contains uracil, whereas RNA contains thymine
b) Only RNA has a free hydroxyl group on the 2’ carbon
c) DNA is usually single-stranded and RNA is usually double-stranded
d) None of the above are true
15. CO2 is generated by:
a) Glycolysis and pyruvate oxidation
b) Pyruvate oxidation and oxidative phosphorylation
c) Glycolysis and the citric acid cycle
d) Pyruvate oxidation and the citric acid cycle
16. Suppose you have a cell sample that has a disorder that causes normal Okazaki fragments to be built
during DNA replication but they are not linked together into a continuous strand. The gene for
which enzyme would you reasonably hypothesize is affected by this disorder?
a) DNA polymerase
b) DNA ligase
c) RNA primase
d) DNA helicase
17. Tropical countries experience much warmer temperatures than Saskatchewan does. How might the
membrane composition of a plant native to Jamaica differ from a native Saskatchewan plant?
a) The Jamaican plant will likely have a higher proportion of saturated fatty acids in its
membrane phospholipids than the Saskatchewan plant
b) The Jamaican plant will likely have a higher proportion of unsaturated fatty acids in its
membrane phospholipids than the Saskatchewan plant
c) The Jamaican plant will likely have a higher proportion of cholesterol in its membrane
than the Saskatchewan plant will.
d) The Jamaican plant will likely have more temperature-regulating proteins in its membrane
than the Saskatchewan plant
18. An unknown nucleic acid was found to contain 12% A, 24% T, 24% G, and 40% C. This suggests that it
is:
a)
b)
c)
d)
A double stranded DNA molecule
A double stranded RNA molecule
A single stranded DNA molecule
A single stranded RNA molecule
19. The citric acid cycle yields:
a) NAD+, FAD, ADP
b) CO2, NADH, FADH2, ATP
c) CO2, NADH, acetyl-CoA
d) ATP
20. Which of the following suggested differences between DNA and RNA are true?
a) DNA contains uracil, whereas RNA contains thymine
b) Only RNA has a free hydroxyl group on the 2’ carbon
c) DNA is usually single-stranded and RNA is usually double-stranded
d) None of the above are true
21. The enzymes required for DNA replication, in order, are:
a) Helicase, DNA polymerase, Primase, Ligase
b) Topoisomerase, Ligase, DNA Polymerase, Primase
c) DNA Polymerase, Helicase, Primase, Ligase
d) Helicase, Primase, DNA Polymerase, Ligase
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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22. A protein in a cell membrane transports one substance against its concentration gradient into the
cell, as well as another substance down its concentration gradient out of the cell. The protein does
not directly hydrolyze ATP. This transporter is most likely a(n) _________ using ____________
a) Symporter, primary active transport
b) Symporter, passive transport
c) Antiporter, secondary active transport
d) Antiporter, primary active transport
23. Phospholipids in the membrane can move in which of the following ways?
a) Laterally throughout the membrane
b) Rotationally in place
c) Spontaneously between layers of the membrane
d) Both a and b
e) a, b, and c
24. For any given gene, a diploid organism has at most ___ alleles.
a) 23
b) 2
c) 46
d) 12
e) Not enough information given
25. Glycolysis occurs in the __________, pyruvate oxidation occurs in the __________, and the citric
acid cycle occurs in the __________________.
a) Mitochondrial intermembrane space; mitochondrial outer membrane; cytosol
b) Cytosol; mitochondrial matrix; mitochondrial matrix
c) Mitochondrial matrix; mitochondrial matrix; cytosol
d) Cytosol; cytosol; mitochondrial matrix
26. In Drosophila, two genes, one for body colour and one for eye colour, are located on the same
chromosome. The wild type grey body colour (G) is dominant to black (g), and wild-type red eyes (R)
are dominant to purple (r). You cross a fly with a grey body and red eyes with a black bodied, purple
eyed fly. 49% of the offspring have grey bodies and red eyes, 48% have black bodies and purple
eyes, and 3% have either black bodies and red eyes or grey bodies and purple eyes. Which of the
following must be true?
a) Both Gr & gR are linked in the first parent and gr in the second
b) Only GR are linked in the first parent and gr in the second
c) Both GR & gr are linked in the first parent and gr in the second
d) Only gr is linked in both parents
27. The plasma membrane is a “mosaic” in the sense that…
a) It is rigid and can be shattered
b) The parts of the membrane are bound in a specific way and cannot move around each
other
c) It is composed of many different types of molecules
d) All of the above
28. C. Botulinum is a bacterium that produces a toxin that causes botulism in humans. Most cases of
botulism occur when food is improperly canned, providing these bacteria with an oxygen-free
environment and a moist food source. C. botulinum is best classified as a(n):
a) Facultative anaerobe
b) Obligate aerobe
c) Strict anaerobe
d) Photosynthetic aerobe
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
29. A DNA template strand with the sequence 5’ – CGATTATCG – 3’ will result in an mRNA with the
sequence:
a) 3’-CGATTATCG-5’
b) 3’-CGAUUAUCG-5’
c) 3’-GCTAATAGC-5’
d) 3’-GCUAAUAGC-5’
30. Which of the following statements regarding eukaryotic mRNA is not true?
a) It must be spliced
b) It is transcribed in the nucleus and translated in the cytosol
c) It as a 3’ guanine cap and a 5’ poly-A tail
d) It is a polymer of adenine, uracil, guanine, and cytosine
31. Epistasis results in:
a) Individuals with extreme variation of a trait
b) One gene influencing multiple phenotypes
c) Non-additive phenotypes
d) A 1:1:1:1 phenotypic ratio
32. Why is sugar oxidized in many small steps rather than all at once?
a) To release more heat energy
b) To transfer energy to other molecules
c) To make the reaction become exergonic
d) To increase the change in free energy
33. As the electrons flow through the mitochondrial Electron Transport Chain, the relative energy
associated with them :
a) increases, ensuring that the energy flows from high to low down the chain
b) increases, ensuring that the energy flows from low to high down the chain
c) decreases, ensuring that the energy flows from high to low down the chain
d) stays the same
34. DNA polymerase III:
a) adds a nucleotide diphosphate to the 3’ end of a DNA primer
b) adds a nucleotide triphosphate to the 5’ end of a DNA primer
c) adds a nucleotide triphosphate to the 3’ end of an RNA primer
d) adds a nucleotide triphosphate to the 5’ end of an RNA primer
35. Which of the following statements about the Citric Acid Cycle is correct?
a) Oxygen and hydrogen produce water
b) The energy in chemical bonds is harnessed as ATP, NADH and FADH2
c) Protons moving across the mitochondrial membrane cause electrons to move to
progressively higher energy states
d) Protons drive ATP synthesis by moving down their electrochemical gradient
36. Sickle cell disease is an example of a(n) ____________ disorder.
a) epistatic
b) sex-linked
c) pleiotropic
d) autosomal dominant
37. From simplest to most complex, nucleic acids are organized as:
a) Chromosomes, Helices, Strands
b) Strands, Chromosomes, Helices
c) Strands, Helices, Chromosomes
d) Helices, Chromosomes, Strands
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
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Biology 120 Mock Final Exam, April 2017
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38. You are part of a group of scientists that are studying a type of microorganism that is threatening to
destroy crops in Saskatchewan. You have isolated a certain enzyme that the microorganism is using
to degrade the crops, and have developed 2 possible chemicals that can be used to stop the enzyme
from functioning properly. Pesticide A is very similar in structure to the substrate of the enzyme,
while Pesticide B is designed to bind at a different site on the enzyme to change its shape and
render it useless. You now have to present a poster comparing and contrasting these two enzymes.
Which of the following statements could you put on the poster?
a) Pesticide A is a competitive inhibitor that binds to the active site; Pesticide B is a
noncompetitive inhibitor that binds to the allosteric site
b) Pesticide A is a noncompetitive inhibitor that binds to the active site; Pesticide B is a
competitive inhibitor that binds to the allosteric site
c) Pesticide A is a competitive inhibitor that binds to the allosteric site; Pesticide B is a
noncompetitive inhibitor that binds to the active site
d) Pesticide A is a noncompetitive inhibitor that binds to the allosteric site; Pesticide B is a
competitive inhibitor that binds to the active site
39. According to Mendel, the offspring of two F1 individuals produced by the dihybrid cross of a
homozygous dominant and a homozygous recessive would follow a phenotypic ratio of:
a) 9:3:3:1
b) 3:1
c) 9:3:4
d) 1:1
40. Which of the following structures is found in cells of Archaea but not your liver?
a) Nucleoid
b) Nucleolus
c) Chloroplasts
d) Ribosomes
41. ATP Synthase:
a) directly synthesizes ATP by movement of protons against a concentration gradient
b) directly synthesizes ATP by movement of protons down a concentration gradient
c) directly synthesizes ATP by movement of electrons from NADH against a concentration
gradient
d) directly synthesizes ATP by movement of electrons from NADH down a concentration
gradient
42. Bruton’s agammaglobulinemia is a genetic disorder that affects more men than women. Which of
the following is true:
a) It is likely caused by an allele found on an autosomal chromosome
b) It is likely caused by a recessive allele found on a sex chromosome
c) It is likely caused by a dominant allele found on a sex chromosome
d) It is impossible to tell whether it is caused by an autosomal or sex linked gene
43. During cellular respiration, oxygen does which of the following:
a) Accepts electrons from glycolysis
b) Donates electrons to the electron transport chain
c) Accepts electrons from the electron transport chain
d) Accepts carbon in the Krebs cycle for CO2 production
44. Which of the following is true?
a) All proteins are enzymes
b) Enzymes have high activation energies
c) Not all proteins are made from amino acids
d) None of the above
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
45. DNA from an unknown organism contains multiple origins of replication. The organism must be:
a) Prokaryotic
b) Eukaryotic
c) Either Prokaryotic or Eukaryotic
d) Neither Prokaryotic nor Eukaryotic - no organism can have multiple ori sites
46. Gene expression is the:
a) flow of information through generations
b) fact that each individual of a species has a unique set of genes
c) fact that individuals of the same species have different phenotypes
d) process by which genetic information flows from genes to proteins
47. Initiation of translation requires the assembly of what components at the start codon?
a) Methionine amino-acyl tRNA
b) Large and small ribosomal subunits and a methionine amino-acyl tRNA
c) Large and small ribosomal subunits
d) Large ribosomal subunit and a cysteine amino-acyl tRNA
48. By the end of the citric acid cycle, the six glucose carbons have been:
a) Reduced
b) Converted to two three-carbon pyruvate molecules
c) Converted to CO2
d) Used to produce acetyl-CoA
49. A non-functional allele for the LDL gene in flies is known to be incompletely dominant. If you cross
two flies, one homozygous for the non-functional allele and one homozygous for the functional
allele, their offspring will have:
a) Normal LDL receptor production
b) Reduced LDL receptor production
c) Severely reduced LDL receptor production
d) There is not enough information to make a conclusion
50. In humans, the SRY protein is responsible for:
a) the production of female sexual characteristics
b) the production of male sexual characteristics
c) regulation of the SRY gene
d) an overwhelming urge to constantly apologize
51. An unknown animal cell contains extensive amounts of endoplasmic reticulum, with many vesicles
travelling from the Golgi apparatus towards the cell membrane. You hypothesize that the cell’s
primary function is most likely:
a) Muscle movement
b) Absorption of nutrients
c) Storage of fats
d) Making and secreting enzymes and/or hormones
52. Catabolic processes…
a) metabolize complex molecules to simpler molecular building blocks
b) are always endothermic reactions (+ΔH)
c) are always exothermic reactions (-ΔH)
d) Both a) and c)
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
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Biology 120 Mock Final Exam, April 2017
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53. Genes x, y, and z are linked, with an 11% recombinant frequency between genes x and y, 7%
between x and z, and 4% between z and y. Which of the following linkage maps is correct?
11 mu
z
a)
y
7 mu
4 mu
x
11 mu
y
b)
x
4 mu
7 mu
z
11 mu
x
c)
7 mu
z
4 mu
y
7 mu
x
d)
11 mu
z
4 mu
y
54. Why is an RNA primer required for the process of DNA replication?
a) To support the activity of the Single-Stranded Binding proteins
b) To keep RNA nucleotides from feeling left out
c) DNA polymerase can only add nucleotides to RNA molecules
d) DNA polymerase can only add nucleotides to an existing 3’ end
55. One of the roles of the Electron Transport Chain Protein Complexes are:
a) to use the energy from accepted electrons to pass protons from the mitochondrial matrix
to the intermembrane space
b) to shuttle electrons back to the Citric Acid Cycle
c) to use the energy from accepted electrons to pass protons from the cytosol to the
intermembrane space
d) to shuttle electrons between ATP Synthase and cytochrome c
56. The end product of the glycolytic pathway is
a) NADH
b) acetyl-CoA
c) lactate
d) pyruvate
57. The enzyme ________ unzips and unwinds DNA strands.
a) DNA polymerase
b) helicase
c) primase
d) DNA ligase
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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58. In what way(s) are proteins more complex than DNA?
a) Proteins can form longer strands of monomers
b) Proteins have a larger variety of monomers
c) Proteins often have a more complex 3-dimensional structure
d) Both a) and b)
e) Both b) and c)
59. A DNA template strand with the sequence 3’-AACGTAACG-5’ is replicated. What is the sequence of
the complementary DNA strand synthesized?
a) 5’ – AACGTAACG – 3’
b) 5’ – UUGCAUUGC– 3’
c) 5’ – AACGUAACG– 3’
d) 5’ – TTGCATTGC– 3’
60. In eukaryotes, the nucleus ___________:
a) stores most of the cell's genetic material in the form of linear DNA
b) allows for transport of material in and out of its nuclear envelope through many small
pores
c) may contain a structure called a nucleolus
d) all of the above
61. Cellular Respiration has been demonstrated to occur in?
a) Dracaena fragrans massangeana; corn
b) Saccharomyces cerevisiae; yeast
c) Escherichia coli; bacterium
d) All of the above
62. A cell is displaying the process of exocytosis when it is …
a) transporting molecules from the plasma membrane to the Golgi apparatus
b) transporting molecules within vesicles to be taken into the cell
c) transporting molecules within vesicles to be released outside the cell
d) transporting molecules from the nucleus to the Rough Endoplasmic reticulum and finally
to the Golgi apparatus
63. Your research lab works with fruit flies. In your latest experiment, you cross a fly who has the
genotype RR with another who has rr. What is the percent of offspring that will be heterozygous?
a) 0%
b) 25%
c) 50%
d) 100%
64. Phospholipids are structured such that…
a) the tails are hydrophobic and positioned towards the outside of the bilayer
b) the tails are hydrophobic and positioned towards the inside of the bilayer
c) the heads are hydrophobic and positioned towards the outside of the bilayer
d) the heads are hydrophobic and positioned towards the inside of the bilayer
65. You have a summer job crossing pea plants in the greenhouses. If you cross one individual
containing the genotype Tt with another who has the genotype tt, what percentage of offspring will
have the dominant phenotype?
a) 25%
b) 50%
c) 75%
d) 100%
66. Which of the following processes occurs in both photosynthesis and in cellular respiration?
a) Glycolysis
b) Chemiosmosis
c) The Calvin Cycle
d) The Kreb’s Cycle
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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67. Which of the following is TRUE about DNA structure?
a) It has a backbone with a slight positive charge
b) The “rungs” are pairs of purines or pyrimidines
c) The two strands are parallel
d) None of the above
68. Members of the bacterial genus Alicyclobacillus are called thermophiles, which means they live in
extreme high temperature environments, like hot springs and geysers. What is thought to be the
primary survival mechanism that allows them to live in such hot environments?
a) Their plasma membranes contain large amounts of cholesterol, which helps maintain the
fluidity and integrity of their membranes
b) They contain special structures that carry out endothermic reactions so as to modulate
their internal temperature
c) Their enzymes have a high optimal temperature, which allows necessary metabolic
reactions to take place at high temperatures
d) They are dormant and not considered true living organisms
69. Which of the following was a prediction of Mendel?
a) Half of all offspring will have the same genotype as one of their parents
b) As gametes are formed, half of the gametes carry one allele, and the other half carry the
other allele
c) Genes of different traits segregate independently during the formation of gametes
d) None of the above
70. Which of the following best explains the difference in cellular division between prokaryotes and
eukaryotes?
a) Prokaryotic cells have no organelles to redistribute
b) Eukaryotic cells have multiple chromosomes
c) Prokaryotes only go through meiosis not mitosis
d) Both a) and c)
e) Both a) and b)
71. Does all mRNA contain a start codon?
a) No, because rRNA and tRNA do not code for proteins and therefore do not require start
codons
b) Yes, because mRNAs code for proteins and therefore require a start codon
c) Yes, because rRNA and tRNA code for proteins and therefore require a start codon
d) No, because mRNA does not code for protein and therefore does not need a start codon
72. In a dihybrid cross between two heterozygous flies, offspring occur in the proportion 9:3:3:1. Which
of the following could not be true?
a) The genes assort independently
b) The genes do not follow Mendel’s Second Law
c) The genes are located on separate chromosomes
d) The genes are more than 50mu apart
73. Colour-blindness is an X-linked recessive genetic trait. If your dad was colour blind but your mom
wasn’t colour blind or a carrier, what would be the probability of you being colour blind?
a) 0%
b) 50%
c) 25%
d) It depends on whether I am a boy or a girl
74. Which of the following is NOT a fundamental mechanism of enzyme action?
a) Bringing the reactant molecules together
b) Etherification of the ligand
c) Exposing the reactant molecule to altered charge environments
d) Changing the shape of the substrate molecule
75. The process by which an amoeba traps its prey is known as:
a) exocytosis
b) pinocytosis
c) phagocytosis
d) autophagy
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
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76. Which of the following is a reason why Mendel used pea plants as a model organism when
conducting research on genetics?
a) Easily identified morphological traits
b) When crossing heterozygous peas a variety of phenotypes can be produced
c) He could grow them in his garden
d) All of the above
77. The plant cell wall is primarily made of ______ and the exoskeleton of an insect is largely made of
_____:
a) chitin, cellulose
b) cellulose, chitin
c) chitin, proteins
d) cellulose, proteins
78. How do enzymes catalyze reactions?
a) By lowering the activation energy
b) By increasing substrate concentration
c) By lowering substrate concentration
d) By contributing needed energy
79. Which of the following are incorrectly matched?
a) Cellular Respiration produces H2O and CO2
b) Photosynthesis produces O2 and Sugars
c) Cellular Respiration produces Glucose and ATP
d) Photosynthesis requires H2O and CO2
80. What is the possible fate of electrons in a pigment being excited?
a) Energy loss to environment
b) Transfer of energy
c) Oxidation of the pigment
d) All of the above
81. Which of the following is evidence that supports the endosymbiotic theory?
a) Mitochondria and chloroplasts have their own genome
b) Mitochondria and chloroplasts have single bilayer membranes
c) Chloroplasts and mitochondria are able to survive outside of the cell
d) None of the above
82. How would a cell transport a fully translated protein through its membrane?
a) Endocytosis or exocytosis
b) Facilitated diffusion
c) Active transport
d) It depends on the polarity, charge, and size of the protein
83. Eye colour in snowy owls is determined by a single gene with 4 possible alleles. If an individual is
heterozygous for that gene, how many alleles for that gene will be present in each of their gametes?
a) 1
b) 2
c) 3
d) 4
84. What path do proteins meant for secretion take?
a) ER  cis Golgi  medial Golgi  trans Golgi  plasma membrane
b) ER  trans Golgi  medial Golgi  cis Golgi  plasma membrane
c) cis-Golgi  trans Golgi  medial Golgi  lysosome  plasma membrane
d) ER  medial Golgi  trans Golgi  cis Golgi  plasma membrane
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
13
85. The alleles for flower colour and stem length segregate together. An unknown cross results in 43%
of the offspring having red flowers and a long stem, 43% white flowers and a short stem, 7% red
flowers and a short stem, and 7% white flowers and a long stem. Which phenotypes are the parental
phenotypes?
a) Red flowers and long stem, and white flowers and short stem
b) Red flowers and long stem, and white flowers and long stem
c) White flowers and short stem, and white flowers and long stem
d) None of the above
86. From the above question, how far apart are the genes on the chromosome?
a) 43 map units
b) 14 map units
c) 86 map units
d) 7 map units
87. A mutation on an enzyme prevents it from binding to its substrate. Where on the enzyme is this
mutation likely located?
a) Allosteric site
b) Lock site
c) Reaction site
d) Active site
88. The Smooth Endoplasmic Reticulum ____________:
a) is where the cell synthesizes proteins
b) stores genetic material in the form of RNA
c) is the site of lipid synthesis in the cell
d) contains hydrolytic enzymes which digests old cellular parts
89. Which of the following does NOT correctly describe microtubules?
a) Microtubules are made of actin dimers
b) Microtubules associate with the motor proteins Dynein and Kinesin
c) Microtubules form the centrioles in animal cells
d) A microtubule is the largest in size of the eukaryotic cytoskeletal components
Note: The following questions deal with photosynthesis, which may not have been covered in lecture
yet. Unless otherwise stated by your instructor, this topic is still expected to be on the final lecture
exam.
90. Your summer research position has you studying the photosynthetic organism Planteae mcplantium.
One day, you observe that some of the thylakoid membranes in your sample have been
compromised so that the stroma is no longer separated from the thylakoid lumen. Which of the
following processes will this damage have the most effect on?
a) the synthesis of ATP
b) The absorption of light energy by chlorophyll
c) The splitting of water molecules
d) the flow of electrons from photosystem II to photosystem I
91. The light reactions of photosynthesis and aerobic respiration are similar in that:
a) Both processes synthesize NADPH
b) Both processes begin with glucose
c) Both processes use a proton-motive force to generate ATP
d) Both synthesize ATP through photophosphorylation
92. In the Calvin Cycle, three molecules of _____ are fixed to synthesize ______ molecules of G3P.
a) ATP; one
b) ATP; three
c) CO2; one
d) CO2; three
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,
Biology 120 Mock Final Exam, April 2017
14
93. Chlorophyll appears green:
a) Because cholorphyll can only absorb energy in the form of green photons, which allows it
to emit green light
b) Because chlorophyll is unable to absorb green photons, and thus green light is reflected
c) Because chlorophyll is a member of Rider nation
d) Because chlorophyll can only absorb energy in the form of blue and yellow photons, which
combined give off a green colour
94. Rubisco is best described as:
a) The sugar catalyst of CO2 fixation in the Calvin cycle
b) The sugar catalyst of CO2 fixation in photosynthesis
c) The enzymatic catalyst of CO2 fixation in the Calvin Cycle
d) The enzymatic catalyst of CO2 fixation in photosynthesis
95. Which of the following is not a function associated with the thylakoids?
a) Light absorption by chlorophylls and carotenoids
b) Calvin cycle
c) Electron transport
d) ATP synthesis by ATP synthase
96. Electrons from photosystem I are donated to:
a) NADP+ reductase on the lumen face of the thylakoid membrane, where NADP+ is reduced
to NADPH
b) NADP+ reductase on the lumen face of the thylakoid membrane, where NADPH is reduced
to NADP+
c) NADP+ reductase on the stroma face of the thylakoid membrane, where NADP+ is
reduced to NADPH
d) NADP+ reductase on the stroma face of the thylakoid membrane, where NADPH is
reduced to NADP+
97. The Calvin Cycle produces ___________, and is an ____________ reaction.
a) Carbohydrate; endergonic
b) CO2; exergonic
c) Carbohydrate; exergonic
d) CO2; endergonic
98. The light-dependent reactions are called such because light:
a) is the source of electrons
b) splits the water molecule directly
c) energizes electrons
d) is a source of Vitamin D
99. Which of the following statements concerning the electromagnetic spectrum is true?
a) Red light is more energetic and of a longer wavelength than blue light
b) Red light is less energetic and of a shorter wavelength than blue light
c) Red light is more energetic and of a shorter wavelength than blue light
d) Red light is less energetic and of a longer wavelength than blue light
100. The Calvin cycle is called light independent, but it will come to a halt if a plant is deprived of light
for a substantial amount of time. This is because:
a) the Calvin cycle converts light energy to chemical energy using an electron transport chain
b) the enzyme Rubisco requires light to function
c) the plant is unable to find CO2 when it is dark
d) the Calvin cycle requires a constant supply of ATP and NADPH generated by light
dependent reactions
Questions and answers for this mock exam will be posted after today’s event http://www.library.usask.ca/sss,