Microbiology Exam Questions with 100% Correct Answers Latest
Graded A+
Question:
Which of the following is a feature shared by viruses and living organisms? A. metabolic capability
B. responsiveness C. presence of cytoplasm D. the ability to increase in size E. possession of a
genome that directs synthesis of materials necessary for replication
Answer:
possession of a genome that directs synthesis of materials necessary for replication
Question:
In what ways do viruses differ from other pathogens? A. Viruses are composed of both protein and
lipid. B. Viruses are composed of protein only. C. Viruses have no protein structure. D. Viruses
lack cytoplasm and organelles. E. Viruses lack genetic material.
Answer:
Viruses lack cytoplasm and organelles.
Question:
The outermost layer of a virion fulfills which of the following functions of the virus? A. protection
B. replication C. recognition D. both protection and recognition E. both recognition and replication
Answer:
both protection and recognition
Question:
Which of the following is a characteristic by which viruses are classified? A. size B. type of life
cycle C. type of host D. number of chromosomes E. type of nucleic acid
Answer:
type of nucleic acid
Host specificity of a virus is due to
Question:
A. differences in size between the virus and the host cell. B. the presence of an envelope. C. the
presence or absence of a cell wall on the host cell. D. interactions between viral and cellular surface
, molecules. E. particular genes that it shares with the infected cell.
Answer:
interactions between viral and cellular surface molecules.
Question:
Which of the following places stages of a lytic replication cycle in order, from earliest to latest
stages? I. Synthesis II. Assembly III. Attachment IV. Release V. Entry A. I, II, III, V, IV B. V, III,
II, IV, I C. III, V, I, II, IV D. III, II, V, I, IV E. I, III, V, II, IV
Answer:
III, V, I, II, IV
Question:
Which of the following membranes can give rise to a viral envelope? A. the nuclear and
cytoplasmic membranes B. the endoplasmic reticulum C. the nuclear membrane D. the cytoplasmic
membrane E. the nuclear and cytoplasmic membranes and the endoplasmic reticulum
Answer:
the nuclear and cytoplasmic membranes and the endoplasmic reticulum
Question:
We sometimes are able to generate antibodies (immune system proteins) that bind to and cover up
some of the proteins on the outermost portion of a virus while it is in the bloodstream. This renders
the virus unable to reproduce. Which step of viral replication are antibodies directly preventing? A .
uncoating B. attachment C. assembly D. synthesis
Answer:
attachment
Question:
Enveloped viruses have a layer of lipids surrounding their capsid. This envelope is made mostly of
host cell membrane. In which step does the virus acquire this envelope? A. release B. attachment C.
synthesis D. assembly
Answer:
release
Question:
Graded A+
Question:
Which of the following is a feature shared by viruses and living organisms? A. metabolic capability
B. responsiveness C. presence of cytoplasm D. the ability to increase in size E. possession of a
genome that directs synthesis of materials necessary for replication
Answer:
possession of a genome that directs synthesis of materials necessary for replication
Question:
In what ways do viruses differ from other pathogens? A. Viruses are composed of both protein and
lipid. B. Viruses are composed of protein only. C. Viruses have no protein structure. D. Viruses
lack cytoplasm and organelles. E. Viruses lack genetic material.
Answer:
Viruses lack cytoplasm and organelles.
Question:
The outermost layer of a virion fulfills which of the following functions of the virus? A. protection
B. replication C. recognition D. both protection and recognition E. both recognition and replication
Answer:
both protection and recognition
Question:
Which of the following is a characteristic by which viruses are classified? A. size B. type of life
cycle C. type of host D. number of chromosomes E. type of nucleic acid
Answer:
type of nucleic acid
Host specificity of a virus is due to
Question:
A. differences in size between the virus and the host cell. B. the presence of an envelope. C. the
presence or absence of a cell wall on the host cell. D. interactions between viral and cellular surface
, molecules. E. particular genes that it shares with the infected cell.
Answer:
interactions between viral and cellular surface molecules.
Question:
Which of the following places stages of a lytic replication cycle in order, from earliest to latest
stages? I. Synthesis II. Assembly III. Attachment IV. Release V. Entry A. I, II, III, V, IV B. V, III,
II, IV, I C. III, V, I, II, IV D. III, II, V, I, IV E. I, III, V, II, IV
Answer:
III, V, I, II, IV
Question:
Which of the following membranes can give rise to a viral envelope? A. the nuclear and
cytoplasmic membranes B. the endoplasmic reticulum C. the nuclear membrane D. the cytoplasmic
membrane E. the nuclear and cytoplasmic membranes and the endoplasmic reticulum
Answer:
the nuclear and cytoplasmic membranes and the endoplasmic reticulum
Question:
We sometimes are able to generate antibodies (immune system proteins) that bind to and cover up
some of the proteins on the outermost portion of a virus while it is in the bloodstream. This renders
the virus unable to reproduce. Which step of viral replication are antibodies directly preventing? A .
uncoating B. attachment C. assembly D. synthesis
Answer:
attachment
Question:
Enveloped viruses have a layer of lipids surrounding their capsid. This envelope is made mostly of
host cell membrane. In which step does the virus acquire this envelope? A. release B. attachment C.
synthesis D. assembly
Answer:
release
Question:
