BIOL201 - Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
the cellular structures shown in fig 3.12 can be found in any bacterium
a. true
b. false - CORRECT ANSWER - b. false
which of the following matches is not supported by fig 3.12 with regard to bacterial structures
and their cellular locations?
a. ribosome/cytoplasm
b. capsule/plasma membrane
c. chromosome/cytoplasm
d. fimbriae/cell wall
e. these matches are all correct - CORRECT ANSWER - b. capsule/plasma membrane
In most prokaryotic cells, morphology is maintained by the ______ in combination with
cytoskeletal elements.
a. plasma membrane
b. cytoplasm
c. chromosome
d. cell wall
e. all of the above
f. a and d - CORRECT ANSWER - d. cell wall
3.14 shows that "streptococcus" means ____.
a. chain of rods
b. chain of cocci
c. cluster of cocci
d. pair of two cocci
,e. b or c - CORRECT ANSWER - b. chain of cocci
Which of the following statements is supported by Fig. 3.16?
a. plasmolysis is the process where the cell membrane detaches from the cell wall and contracts
b. plasmolysis occurs in hypotonic medium
c. plasmolysis leads to cell lysis (bursting)
d. all of the above
e. a and c - CORRECT ANSWER - a. plasmolysis is the process where the cell membrane
detaches from the cell wall and contracts
Which of the following statements about bacterial chromosome and plasmids is correct?
A. Both contain DNA.
B. Bacterial chromosomes are typically linear whereas bacterial plasmids are typically circular.
C. Bacterial plasmids are known as extrachromosomal DNA.
D. All of them are correct
E. A and C - CORRECT ANSWER - e. a and c
3.18 shows that complete bacterial ribosomes have a size of ____.
A. 30S
B. 50S
C. 80S
D. 70S
E. 60S - CORRECT ANSWER - d. 70s
Endospores as shown in Fig. 3.20 can be produced by ____.
A. all bacteria
B. bacteria from the genus Bacillus
C. bacteria from the genus Clostridium
, D. All of the above
E. B and C - CORRECT ANSWER - e. b and c
3.25 shows that peptidoglycan is composed of long chains of alternating molecules of ____.
A. N-acetylglucosamine
B. N-acetylmuramic acid
C. tetrapeptide
D. all of the above
E. A and B - CORRECT ANSWER - e. a and b
Peptidoglycan ____.
A. is the major component of bacterial cell walls
B. is found in eukaryotic cells that have cell walls
C structurally resembles a layer of meshwork or fabric
D. All of the above
E. A and C - CORRECT ANSWER - e. a and c
Certain cells of the human immune system are able "recognize" bacterial pathogens by detecting
peptidoglycan on the surface of a bacterial cell; these cells then engulf and destroy the bacterial
cell, using enzymes such as lysozyme, which breaks down and digests the peptidoglycan in their
cell walls.
A. True
B. False - CORRECT ANSWER - a. true
Which of the following statements is not supported by Fig. 3.26?
A. Teichoic acid is only found in the cell wall of Gram positive bacteria.
B. Gram negative bacteria have an outer membrane as part of the cell wall
C. A thick layer of peptidoglycan is found in both Gram positive and Gram negative bacteria.
D. These statements are all supported.
Exam Questions and CORRECT Answers
the cellular structures shown in fig 3.12 can be found in any bacterium
a. true
b. false - CORRECT ANSWER - b. false
which of the following matches is not supported by fig 3.12 with regard to bacterial structures
and their cellular locations?
a. ribosome/cytoplasm
b. capsule/plasma membrane
c. chromosome/cytoplasm
d. fimbriae/cell wall
e. these matches are all correct - CORRECT ANSWER - b. capsule/plasma membrane
In most prokaryotic cells, morphology is maintained by the ______ in combination with
cytoskeletal elements.
a. plasma membrane
b. cytoplasm
c. chromosome
d. cell wall
e. all of the above
f. a and d - CORRECT ANSWER - d. cell wall
3.14 shows that "streptococcus" means ____.
a. chain of rods
b. chain of cocci
c. cluster of cocci
d. pair of two cocci
,e. b or c - CORRECT ANSWER - b. chain of cocci
Which of the following statements is supported by Fig. 3.16?
a. plasmolysis is the process where the cell membrane detaches from the cell wall and contracts
b. plasmolysis occurs in hypotonic medium
c. plasmolysis leads to cell lysis (bursting)
d. all of the above
e. a and c - CORRECT ANSWER - a. plasmolysis is the process where the cell membrane
detaches from the cell wall and contracts
Which of the following statements about bacterial chromosome and plasmids is correct?
A. Both contain DNA.
B. Bacterial chromosomes are typically linear whereas bacterial plasmids are typically circular.
C. Bacterial plasmids are known as extrachromosomal DNA.
D. All of them are correct
E. A and C - CORRECT ANSWER - e. a and c
3.18 shows that complete bacterial ribosomes have a size of ____.
A. 30S
B. 50S
C. 80S
D. 70S
E. 60S - CORRECT ANSWER - d. 70s
Endospores as shown in Fig. 3.20 can be produced by ____.
A. all bacteria
B. bacteria from the genus Bacillus
C. bacteria from the genus Clostridium
, D. All of the above
E. B and C - CORRECT ANSWER - e. b and c
3.25 shows that peptidoglycan is composed of long chains of alternating molecules of ____.
A. N-acetylglucosamine
B. N-acetylmuramic acid
C. tetrapeptide
D. all of the above
E. A and B - CORRECT ANSWER - e. a and b
Peptidoglycan ____.
A. is the major component of bacterial cell walls
B. is found in eukaryotic cells that have cell walls
C structurally resembles a layer of meshwork or fabric
D. All of the above
E. A and C - CORRECT ANSWER - e. a and c
Certain cells of the human immune system are able "recognize" bacterial pathogens by detecting
peptidoglycan on the surface of a bacterial cell; these cells then engulf and destroy the bacterial
cell, using enzymes such as lysozyme, which breaks down and digests the peptidoglycan in their
cell walls.
A. True
B. False - CORRECT ANSWER - a. true
Which of the following statements is not supported by Fig. 3.26?
A. Teichoic acid is only found in the cell wall of Gram positive bacteria.
B. Gram negative bacteria have an outer membrane as part of the cell wall
C. A thick layer of peptidoglycan is found in both Gram positive and Gram negative bacteria.
D. These statements are all supported.
