Explore topic-wise MCQs in Microbiology.

This section includes 67 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.

51.

The phage components begin to assemble into mature phages only after the synthesis of

A. structural protein
B. nucleic acid
C. Both (a) and (b)
D. amino acids
Answer» D. amino acids
52.

Which of the following oncogenic viruses was first detected?

A. Rous sarcoma virus.
B. Epstein-Barr virus
C. Herpes simplex virus type 2
D. Human T cell leukaemia virus
Answer» B. Epstein-Barr virus
53.

Inclusion bodies of measles virus are

A. intracytoplasmic
B. intranuclear
C. both (a) and (b)
D. none of these
Answer» D. none of these
54.

The most efficient way to enclose a space is within a/an

A. sphere
B. cube
C. icosahedron
D. helix
Answer» D. helix
55.

Which of the following is an example of rod-shaped viruses having their capsomeres arranged helically and not in the stacked ring?

A. Bateriophage M13
B. Bateriophage MV-L2
C. Bateriophage T2
D. Bateriophage T4
Answer» B. Bateriophage MV-L2
56.

The infected cells continue to reproduce themselves as well as the virus, and the mature virions are extruded from the cell surface continuously over a long period of time. This type of release mechanism is called a

A. productive infection
B. inductive infection
C. resultant infection
D. all of these
Answer» B. inductive infection
57.

What kind of embryo is often used for viral assays?

A. Mouse
B. Rat
C. Cat
D. Chicken
Answer» E.
58.

The envelope of an enveloped virus is derived from

A. the mitochondrion of the cell
B. the cell membrane
C. the endoplasmic reticulum of the cell
D. none of these
Answer» C. the endoplasmic reticulum of the cell
59.

The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as

A. A
B. B
C. C
D. D
Answer» B. B
60.

Which of the following is not true of virions?

A. Reproduce independently
B. Contain DNA
C. Contain RNA
D. Are extracellular
Answer» B. Contain DNA
61.

Bacteriophages have been used widely in genetic research, since they are the smallest and simplest biological entities capable of

A. self-replication
B. duplication
C. self-duplication
D. multiplication
Answer» B. duplication
62.

Lesions on chorioallantoic membrane are produced by

A. Herpes B virus
B. Vaccinia virus
C. Herpes simplex virus
D. all of these
Answer» E.
63.

Which one is not useful in the treatment of viruses except

A. acyclovir
B. interferon
C. penicillin
D. antibodies
Answer» D. antibodies
64.

The first step in infection of a host bacterial cells by a phage is

A. adsorption
B. absorption
C. penetration
D. replication
Answer» B. absorption
65.

During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as

A. eclipse period
B. rise period
C. latent period
D. burst size
Answer» B. rise period
66.

Usually viruses are separated into several large groups based primarily on

A. nature of the host
B. nucleic acid characteristics
C. capsid symmetry
D. diameter of the viroin or nucleocapsid
Answer» B. nucleic acid characteristics
67.

Virus reproduces in living cells by

A. replication
B. duplication
C. multiplication
D. all of these
Answer» B. duplication