• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Microbe_Mission_Practice_Test_B
Microbe_Mission_Practice_Test_B

... 6. How is the total magnification of a microscope determined? ______________________________________________________________________________ 7. What happens to the size of the field of view when changing objectives from high power to low power? _______________________________________________________ ...
PPT
PPT

... synthetically on a large scale. Chloramphenicol is effective against a wide variety of microorganisms and still widely used in low income countries because of its low cost. • This antibiotic is still used in aquatic industry. • It functions by inhibiting peptidyl transferase activity of the bacteria ...
Hunt, D.E. Motility in the marine environment: an adaptive response
Hunt, D.E. Motility in the marine environment: an adaptive response

... amino acids and vitamins (Myklestad 1995). Interactions between phytoplankton-heterotrophs may be highly specific with algal products serving as both bacterial attractants and repellents (Bell et al. 1972); and specific bacterial groups co-culturing with algae (Schafer et al. 2002). Modeling suggest ...
My Course - the Biology Scholars Program Wiki
My Course - the Biology Scholars Program Wiki

... • Impact sensitivity to antibiotics and disinfectants ...
FAQs What is reproduction? Ans: Production of new individuals or
FAQs What is reproduction? Ans: Production of new individuals or

... These akinetes are resistant to unfavorable environmental conditions. What are hormogonia? Ans: Under favorable conditions, all filamentous Cyanobacteria reproduce by fragmentation of their filaments (trichomes) at more or less regular intervals to form short pieces each consisting of 5-15 cells. Th ...
Poster Thomas Sutherland DMMI - Workspace
Poster Thomas Sutherland DMMI - Workspace

... cell membranes, while IF staining shows presence of tight junction proteins Occludin and ZO-1. ...
Lesson 2: Prokaryotic and Eukaryotic Cells (1
Lesson 2: Prokaryotic and Eukaryotic Cells (1

... Plant and animal cells have many similarities and differences. Plant cells are autotrophs because they make their food through photosynthesis. Animal cells are heterotrophic because they get their food from other sources. The illustration in Figure 2.3 compares and contrasts plant and animal cells. ...
Summary for first examination (March 8, 2011) The first and most
Summary for first examination (March 8, 2011) The first and most

... d) were performed only after he had developed the procedure of Pasteurization. 11. When Pasteur boiled a flask containing fruit juice and then pulled the neck to make a swan-necked flask, no spoilage occurred. Which of the following is an accurate explanation of what happened? a) Boiling the flask k ...
Cell Transport - pdecandia.com
Cell Transport - pdecandia.com

... channels open allowing specific molecules to pass Ex: this type receptor protein found in nervous system ...
Bacterial Growth - Belle Vernon Area School District
Bacterial Growth - Belle Vernon Area School District

... oxygen but others are killed by it? Oxygen can be converted into a toxic form like hydrogen peroxide (H2O2) & Superoxide (O2-). Cells that do not die in the presence of oxygen produce enzymes (Superoxide dismutase) into a harmless form (H20 & O2). ...
Lec.3
Lec.3

... (NO3–) and nitrite (NO2–) reductively by conversion of these ions into NH3. A few bacteria use N2 in nitrogen fixation, a process by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3). 3- Sulfur Source: Sulfur in its elemental form cannot be used by plants or animals. However, som ...
Movement Through Membranes
Movement Through Membranes

... Act as insulation, a source of energy, and are a major part of the plasma membrane of cells Found in nuts, animal, dairy, and some plant food sources and many processed foods Can test for fat and oil using the paper bag test Can test for fats oils using an organic solvent Elements that make up fats ...
Solutions and Biochemistry
Solutions and Biochemistry

... Act as insulation, a source of energy, and are a major part of the plasma membrane of cells Found in nuts, animal, dairy, and some plant food sources and many processed foods Can test for fat and oil using the paper bag test Can test for fats oils using an organic solvent Elements that make up fats ...
Bacterial physiology
Bacterial physiology

... Metabolism describes all of the chemical reactions that are happening in the cell. Some reactions, called anabolic reactions, create’ needed products. Other reactions, called catabolic reactions, break down products. Your body is, performing both anabolic and catabolic reactions at the same time and ...
Unit 1 Topic 1: Cells - Inverness Royal Academy
Unit 1 Topic 1: Cells - Inverness Royal Academy

... The pH fell because ________________ is an acidic gas ...
plant and animal cells
plant and animal cells

... FUNGI AND BACTERIA Yeast cells are important to biotechnology because under the right conditions they can convert sugars into alcohol and carbon dioxide – this process is called fermentation. ...
The cell membrane
The cell membrane

... 3. Receptor Proteins – molecular triggers that set off cell responses (such as release of hormones or opening of channel proteins). 4. Cell Recognition Proteins – ID tags, to identify cells to the body's immune system. ...
Microbiology: Study of microbes What is a microbe?
Microbiology: Study of microbes What is a microbe?

... • Many are microscopic • Fungi contain cell walls but are not photosynthetic • Molds are typically multicellular and have sexual and non-sexual reproduction by spores • Yeasts are unicellular and reproduce asexually by budding or via sexual spores ...
Cells_24912
Cells_24912

... through a cytoskeleton and have ribosomes that float in the cytoplasm. In addition, some prokaryotes have a special type of cell wall made of a proteinsugar combination called peptidoglycan. A few prokaryotes possess whiplike tails called flagella that help propel the cells through water. Though les ...
113250_Tax_Review___Dichot
113250_Tax_Review___Dichot

... Includes the disease-causing bacteria such as tooth decay or food poisoning. The Combined Kingdoms, Archaebacteria and Eubacteria include the greatest number of living things on Earth. ALL OF THE PROKARYOTES ARE IN THESE TWO KINGDOMS. Both reproduce by binary fission, but they do have some ways to r ...
Standards Checklist
Standards Checklist

...  predict the fate of a cell based on concentration  determine the water concentration based on solution concentration  complete a graphic organizer explaining each step of the process  recognize that mitosis is a form of asexual reproduction and explain why mitosis is asexual (ex. same chromosom ...
Chapter 5
Chapter 5

... 2.Arrangement of phospholipids in water (two layers, heads pointed out, tails pointed in): Figure 5.1b ...
Key - Scioly.org
Key - Scioly.org

... c. Viroid: short strands of circular, single­stranded RNA w/o protein coats  4. 1 point for definition, 1 point for each piece of evidence (up to 3) (4 pt total)  a. The mitochondria and chloroplast were free­living prokaryotes that became incorporated into  eukaryotes.  b. Evidence: mitochondria an ...
Powerpoint
Powerpoint

... Endocytosis is the process used to ingest materials and bring them inside the cell. Due to the fluidity of the plasma membrane it is able to fold around materials in the external environment and bring them inside within a small pouch called a vesicle. Once inside the cell these vesicles often fuse w ...
V: 0
V: 0

... The Archaea are one of two groups of prokaryotic organisms, organisms with no nuclear membrane. (Bacteria are the other group.) Archaea are believed to be the earliest form of life on Earth. Although both archaea and bacteria are simple life-forms, archaea are very different from bacteria. ...
< 1 ... 87 88 89 90 91 92 93 94 95 ... 143 >

Chemotaxis



Chemotaxis (from chemo- + taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. This is important for bacteria to find food (e.g., glucose) by swimming toward the highest concentration of food molecules, or to flee from poisons (e.g., phenol). In multicellular organisms, chemotaxis is critical to early development (e.g., movement of sperm towards the egg during fertilization) and subsequent phases of development (e.g., migration of neurons or lymphocytes) as well as in normal function. In addition, it has been recognized that mechanisms that allow chemotaxis in animals can be subverted during cancer metastasis.Positive chemotaxis occurs if the movement is toward a higher concentration of the chemical in question; negative chemotaxis if the movement is in the opposite direction. Chemically prompted kinesis (randomly directed or nondirectional) can be called chemokinesis.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report