MCQOPTIONS
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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 | |