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Microbiology Chapter 4 Test Bank 2024/2025 ( 100% verified)
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Microbiology Chapter 4 Test Bank 2024/2025 ( 100% verified)
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Microbiology Chapter 4 Test BankE - ANSWhich of the following statements is INCORRECT regarding prokaryotic cells?
A) Their DNA is not enclosed within a membrane.
B) They lack membrane-enclosed organelles.
C) They typically have a circular chromosome.
D) They reproduce by binary fission.
E) They lack a plasma membrane.
C - ANSEach of the following statements concerning the gram-positive cell wall is true EXCEPT
A) it maintains the shape of the cell.
B) it is sensitive to lysozyme.
C) it protects the cell in a hypertonic environment.
D) it contains teichoic acids.
E) it is sensitive to penicillin.
C - ANSWhich of the following statements best describes what happens when a bacterial cell is
placed in a solution containing 5% NaCl?
A) Sucrose will move into the cell from a higher to a lower concentration.
B) The cell will undergo osmotic lysis.
C) Water will move out of the cell.
D) Water will move into the cell.
E) No change will result; the solution is isotonic.
A - ANSA gram-positive bacterium suddenly acquires resistance to the antibiotic methicillin. This
trait most likely occurred due to acquisition of new genetic information through
, A) conjugation.
B) binary fission.
C) meisosis.
D) transformation.
E) transduction.
C - ANSBy which of the following mechanisms can a cell transport a substance from a lower to
a higher concentration?
A) simple diffusion
B) facilitated diffusion
C) active transport
D) extracellular enzymes
E) aquaporins
D - ANSWhich of the following is NOT a typical characteristic of most bacterial plasma
membranes?
A) site of energy production
B) composed of a phospholipid bilayer
C) contains proteins
D) contains cholesterol
E) is selectively permeable
B - ANSWhich one of the following organisms has a cell wall?
A) protoplasts
B) fungi
C) L forms
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