Microbiology By Body System Chapter 3

60 Questions | By Coachalan32309 | Last updated: Mar 20, 2022 | Total Attempts: 224

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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