

MCQOPTIONS
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 | |