Download Comparison Of Questions From Science 10 Biology 20 And Biology 30

Science 10 Questions:
1. Diffusion differs from osmosis in that, diffusion moves
A. any molecules from an area of low concentration to an area of high concentration.
B. any molecules from an area of high concentration to an area of low concentration.
C. only water molecules from an area of low concentration to an area of high
concentration.
D. only water molecules from an area of high concentration to an area of low
concentration.
2. Which direction will water move if a cell is hypertonic to its environment?
A.
B.
C.
D.
Into the cell.
Out of the cell.
In and out of the cell equally.
Not move at all.
3. Division of labour in cells is associated with
A.
B.
C.
D.
increased efficiency
increased size
decreased stress
decreased productivity
4. Increased surface area in a cell is important because
A.
B.
C.
D.
it allows cells to communicate better internally and externally.
it allows cells to differentiate into specialized systems.
it allows multicellular organisms to survive even if one cell dies.
all of the above.
5. The correct sequence of organelle interaction showing the process of hormone exocytosis in an
animal cell is:
A.
B.
C.
D.
Nucleus, smooth ER, mitochondria, vacuole, cell membrane.
Smooth ER, golgi apparatus, mitochondria, nucleus.
Rough ER, golgi apparatus, vesicle, cell membrane
Nucleus, mitochondria, golgi apparatus, rough ER.
6. Plant cells undergo which chemical reactions?
A.
B.
C.
D.
C6H12O6 + 6O2  6CO2 + 6H2O + ATP
6CO2 + 6H2O + Solar Energy  C6H12O6 + 6O2
Amino Acid + Amino Acid  Protein
All of the above
Biology 20 Questions:
1. When the solute concentration of the cytoplasm is the same as that of the extracellular-fluid,
A. more water moves out of the cell than into it
B. less water moves out of the cell than into it
C. water will not move into or out of the cell
D. water moves at equal rates both into and out of the cell
Use the following information to answer the next question.
2. What process would account for the increase in the concentration of sugar within the cell after one
hour?
A. Osmosis
B. Diffusion
C. Ionic attraction
D. Active transport
3. In which activity would the human body NOT utilize ATP?
A. Digestion
B. Synthesis of hormones
C. Diffusion of water from interstitial fluid to capillaries
D. Movement of glucose molecules out of nephrons into interstitial fluid
4. In which cells would you expect to find the most Golgi bodies?
A. Hair cells
B. Gland cells
C. Muscle cells
D. Red blood cells
Biology 30 Questions:
1. Which gland produces a hormone that directly increases blood supply to skeletal muscles and
increases the rate of contraction of heart muscle?
A.
B.
C.
D.
Pancreas
Adrenal gland
Thyroid gland
Pituitary gland
2. Which sequence illustrates a mechanism used by the body to control the blood glucose level?
A.
B.
C.
D.
Blood glucose increases  release of glucagon increases conversion of glycogen into
glucose decreases  blood glucose decreases
Blood glucose decreases  release of glucagon decreases  conversion of glycogen
into glucose decreases  blood glucose increases
Blood glucose increases release of insulin increases conversion of glucose into
glycogen increases  blood glucose decreases
Blood glucose decreases  release of insulin decreases  conversion of glucose into
glycogen increases  blood glucose increases
Use the following information to answer the next two questions
When the Chernobyl nuclear reactor in Ukraine melted down, clouds of radioactive material
including iodine, were released into the atmosphere. Iodine is actively absorbed by a certain
gland in the body. Scientists were worried that the radioactive iodine would cause tumors in this
gland. In an attempt to avoid this problem, people who lived near the reactor were given large
doses of non-radioactive iodine.
3. How would the ingestion large doses of non-radioactive iodine reduce a person’s chances of
getting a tumor in a particular gland?
A.
B.
C.
D.
The pituitary would become saturated with non-radioactive iodine and this would limit the
absorption of radioactive iodine
The thyroid would become saturated with non-radioactive iodine and this would limit the
absorption of radioactive iodine
Increased levels of iodine would stimulate hormonal production by the pituitary and limit
tumor formation
Increased levels of iodine would stimulate hormonal production by the thyroid and limit
tumor formation
Use the following information to answer the next question
Multiple sclerosis (MS) is a disorder that causes the destruction of myelin sheaths surrounding
neurons. People with MS display many symptoms, including slurred speech, double vision, and
poor muscle coordination.
4. What is the direct effect of MS on nerve impulse transmission?
A.
B.
C.
D.
Dendrites cannot be stimulated by acetylcholine, therefore impulses are not generated in
neurons.
Axons cannot secrete acetylcholine, therefore impulses are not able to travel across
synapses.
The threshold level of stimulation for neurons is greater than normal.
The movement of impulses along neurons is slower than normal.
Use the following information to answer the next question
1.
2.
3.
4.
Attachment of neurotransmitters to receptor molecules
Diffusion of neurotransmitters across the synapse
Destruction of the neurotransmitter by an enzyme
Exocytosis of the neurotransmitter
Numerical Response
2. Identify the sequence of events that would occur when a signal crosses the synapse.
(Record your four-digit answer in the numerical-response section of the answer sheet.)
Answer: ___________
Science 10 Written Response:
1. As much as 90% of a mature plant cell may be occupied by a vacuole. Vacuoles are filled with
“cell sap” which is comprised of mainly water. One of the main roles of the vacuole is the
maintenance of rigid plant ground tissue (stems and leaves) which is accomplished through
turgor pressure.
a) Define turgor pressure as it is relevant to plant cells. Include a diagram if necessary. (2
marks)
b) Stomata opening and closing is regulated by K+ ion movement across the guard cell
membrane. When guard cells are turgid and filled with fluid, the stomata is open and when
the guard cells shrink, the stomata is closed. Using the concept of osmosis, explain the
direction the K+ ions and water molecules would have to move to open and close the
stomata. You may use pictures to explain your answer. (4 marks)
c) How and why would a plant’s guard cells respond to a lack of moisture? (2 marks)
Biology 20 Written Response:
1. Use the following information to answer the next questions.
A Digestion Experiment
A student designed an experiment to test the effect of pH on the ability of
enzyme X to digest egg albumin, which is a protein.
Procedure
Data Table
1. The student added 3 g of egg
albumin and 5 mL of enzyme X
solution to each of five test tubes.
Test
Tube
pH
Mass of Egg Albumin
Remaining after 24 h (g)
I
1.0
0.4
2. 5 mL of pH buffer were added
to each tube to adjust the pH
levels shown in the to data table.
II
3.0
0.1
III
5.0
0.7
IV
7.0
1.7
V
9.0
1.8
3. The test tubes and their
contents were incubated at 37ºC
for 24 h.
4. After incubation, the mass of
egg albumin remaining in each
test tube was determined. The
results were recorded in the data
table.
Complete the following:
a) State the problem or question that is being investigated in this design. (1 mark)
b) What is/are the controlled variables in this design? (2 marks)
c) What is/are the manipulated variables in this design? (1 mark)
d) What is/are the responding variables? (1 mark)
e) Predict what the optimum pH would be for enzyme X. Explain your answer. (2 mark)
Biology 30 Written Response:
1. The islets of Langerhans are small clusters of cells in the pancreas. They monitor and regulate blood
glucose levels. In patients with type I diabetes mellitus, the islet cells no longer produce one of the
major hormones necessary to control blood glucose levels. Until about 75 years ago, these patients
died within months of the onset of the disease. Today, these patients are treated to control blood
glucose levels, and they are able to live relatively normal lives. However, many of these patients
eventually do suffer from diabetes-related disorders caused by abnormal fluctuations in blood glucose
levels. These fluctuations can damage blood vessels and may result in blindness, kidney failure, and
blood circulation problems in the feet and hands.
Recent research has focused on transplanting islet cells from a donor pancreas into a diabetic
patient. The islet cell clusters are separated from other pancreatic cells and injected into the large
vein that leads into the patient’s liver (hepatic portal vein). The clusters lodge in small blood vessels in
the patient’s liver and begin to produce hormones in response to changing blood glucose levels.
a) Identify the hormone lacking in a person with type I diabetes mellitus. [1]
b) Explain two physiological mechanisms by which this hormone regulates blood glucose
levels. Draw a feedback loop that illustrates this regulation. [3]
c) Explain why successful islet cell transplants may prevent some physiological problems
experienced by many patients with diabetes mellitus. [3]
d) Describe two technological issues and one societal issue that researchers may have faced
during the development of the islet cell transplant procedure. [3]