Microbiology By Body System Chapter 3
This is your description.
- 1.Using a microscope, you observe an amoeba moving toward a food source. This is an example of
- A.
Metabolism
- B.
Cellular structure
- C.
Responsiveness
- D.
Growth
- E.
Reproduction
- 2.Which of the following is NOT a component of bacterial flagella?
- A.
Hook
- B.
Basal body
- C.
Filament
- D.
Flagellin
- E.
Tubulin
- 3.Which of the following statements concerning the characteristics of life is FALSE?
- A.
Viruses have some, but not all, of the characteristics of living things.
- B.
Organisms may not exhibit all of the characteristics of life at all times.
- C.
Reproduction can occur asexually or sexually in living things.
- D.
Reproduction is defined as an increase in the size of an organism.
- E.
Living things store metabolic energy in the form of chemicals such as ATP.
- 4.Bacterial pili can be described as
- A.
Composed of tubulin
- B.
Composed of peptidoglycan
- C.
Solid, rigid protein structures.
- D.
A means of locomotion.
- E.
Specialized fimbriae.
- 5.Which of the following bacterial cell structures plays an important role in the creation of biofilms?
- A.
Glycocalyces
- B.
Fimbrae
- C.
Pili
- D.
Flagella
- E.
Both fimbrae and glycocalyces
- 6.Short, hairlike structures used only by eukaryotic cells for movement are called
- A.
Pili
- B.
Flagella
- C.
Fimbriae
- D.
Cilia
- E.
Pseudopodia
- 7.A bacterial cell moving toward light would be an example of
- A.
Positive phototaxis.
- B.
Negative phototaxis.
- C.
Positive chemotaxis.
- D.
Negative chemootaxis.
- E.
Tumbles
- 8.Which of the following statements concerning prokaryotic flagella is FALSE?
- A.
Treponema is an example of a bacterium that has an endoflagellum.
- B.
Prokaryotic flagella are anchored to the cell wall by means of the basal body.
- C.
A ʺrunʺ results from counterclockwise movement of the flagellum.
- D.
Prokaryotic flagella are composed of tubulin.
- E.
Prokaryotic flagella can rotate 360 degrees.
- 9.Which of the following statements concerning pili is FALSE?
- A.
A bacterial cell will usually have only one or two pili.
- B.
Pili facilitate the transfer of DNA among bacterial cells
- C.
Not all bacteria have pili.
- D.
Pili are long, hollow tubules.
- E.
Pili are longer than fimbriae and flagella.
- 10.Which of the following is NOT a component of bacterial cell walls?
- A.
Lipoteichoic acids
- B.
Tubulin
- C.
Peptidoglycan
- D.
tetrapeptide
- E.
Mycolic acid
- 11.Bacterial cell walls that are resistant to drying contain
- A.
Waxes
- B.
Carbohydrates
- C.
Amino acids
- D.
Lipopolysaccharide
- E.
Tubulin
- 12.Lipid A is also known as
- A.
Teichoic acid.
- B.
Tetrapeptide.
- C.
Endotoxin.
- D.
Lipopolysaccharide.
- E.
Mycolic acid.
- 13.Bacteria of the genus Mycoplasma are distinguished from other bacterial cells by
- A.
Cell walls composed solely of amino acids.
- B.
Unique ribosomes.
- C.
the absence of a cytoplasmic membrane.
- D.
The presence of mycolic acid in their cell walls.
- E.
The absence of a cell wall.
- 14.Lipid-soluble molecules would be expected to cross the cytoplasmic membrane by which of the following processes?
- A.
Facilitated diffusion
- B.
Diffusion
- C.
Osmosis
- D.
Active transport
- E.
Group translocation
- 15.ATP is expended in which of the following processes?
- A.
Active transport
- B.
Diffusion
- C.
Facilitated diffusion
- D.
Group atransloction
- E.
Both active transport and group translocation
- 16.Which of the following statements concerning osmosis is FALSE?
- A.
Osmosis stops when the system reaches equilibrium
- B.
During osmosis, water crosses to the side of the membrane with a lower solute concentration.
- C.
Osmosis requires a selectively permeable membrane
- D.
Cells placed in hypotonic solutions will gain water
- E.
Crenation results when cells are placed in a hypertonic solution.
- 17.Endospores survive a variety of harsh conditions in part because of the presence of
- A.
Dipicolinic acid.
- B.
Lipopolysaccharide.
- C.
Mycolic acid.
- D.
Hopanoids.
- E.
Glycopteinsro.
- 18.The glycocalyx of a eukaryotic cell performs all of the following functions EXCEPT
- A.
Transfer of genetic material between cells.
- B.
Anchoring cells to each other.
- C.
Protection against dehydration
- D.
Strengthening the cell surface
- E.
Cellular recognition and communication.
- 19.Which of the following is unique to archaea?
- A.
LPS
- B.
Peptidoglycan
- C.
Fimbriae
- D.
Pili
- E.
Hami
- 20.When cells are placed in a hypertonic solution, they lose water and shrivel. This process is called
- A.
Passive transport.
- B.
Plasmalemma
- C.
Crenation
- D.
Endocytosis
- E.
Periplasm
- 21.Which of the following statements concerning endocytosis and exocytosis is CORRECT?
- A.
Waste products and secretions are exported from the cell during endocytosis.
- B.
Phagocytosis is a type of endocytosis in which liquids are brought into the cell.
- C.
These processes occur in both prokaryotes and eukaryotes.
- D.
Endocytosis produces a structure called a food vesicle.
- E.
Endocytosis is a form of passive transport, whereas exocytosis is a form of active transport.
- 22.One lipid found in eukaryotes but NOT in prokaryotes is
- A.
Lipopolysaccharide
- B.
Fatty acid
- C.
Phospholipid
- D.
Steroid
- E.
Hopanoid
- 23.Which of the following statements concerning centrioles is FALSE?
- A.
Centrioles are found in a region of the cell called the centrosome.
- B.
Centrioles are believed to play a role in cellular processes such as mitosis and cytokinesis.
- C.
Centrioles are composed of microtubules.
- D.
The structure of centrioles is similar to that of eukaryotic flagella and cilia.
- E.
Centrioles are found in all organisms except prokaryotes.
- 24.Which of the following is classified as a membranous organelle of eukaryotic cells?
- A.
Centriole
- B.
Endoplasmic reticulum
- C.
Cytoskeleton
- D.
Ribosome
- E.
Both ribosomes and centrioles
- 25.Which of the following is NOT associated with the nucleus of a eukaryotic cell?
- A.
Chromatin
- B.
Histones
- C.
Nucleolus
- D.
Nucleoplasm
- E.
Cristae
Questions: 45 | Attempts: 23246 | Last updated: Aug 20, 2020
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