MCQOPTIONS
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MCQOPTIONS
This section includes 128 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Entry of 'HIV' virus in cell is blocked by the |
| A. | Amantadine |
| B. | Ganciclovir |
| C. | Enfuvirtide |
| D. | Maraviroc |
| Answer» D. Maraviroc | |
| 102. |
If an antibodies injects in human body for protection against foreign agent, resulting immunity is |
| A. | Active immunity |
| B. | Passive immunity |
| C. | Defense mechanism |
| D. | Drug therapy |
| Answer» C. Defense mechanism | |
| 103. |
An important 'mediator' of pain is |
| A. | Histamine |
| B. | Bradykinin |
| C. | Prostaglandin |
| D. | Chemokines |
| Answer» C. Prostaglandin | |
| 104. |
Urine culture is used, when a person is suspected with a disease, known as |
| A. | Cystitis |
| B. | Whooping cough |
| C. | Fever |
| D. | Pneumonia |
| Answer» B. Whooping cough | |
| 105. |
Immunization refers to |
| A. | engulfing toxins by phagocytes |
| B. | producing more phagocytes |
| C. | maintain a level of antibodies to confer immunity |
| D. | a severe medical condition |
| Answer» D. a severe medical condition | |
| 106. |
Polymorphonuclear leukocytes (or PMNs) |
| A. | can be attracted to the site of an infection following activation of complement |
| B. | are derived from bone marrow stem cells |
| C. | are a type of phagocyte that can engulf and kill bacteria |
| D. | all of the above |
| Answer» E. | |
| 107. |
Replication of influenza 'A' virus is inhibited by |
| A. | Amantadine |
| B. | Ganciclovir |
| C. | Acyclovir |
| D. | Vidarabine |
| Answer» B. Ganciclovir | |
| 108. |
When tuberculosis and pneumonia is suspected, diagnosis is carried out in laboratory by using |
| A. | Throat culture |
| B. | Blood culture |
| C. | Sputum culture |
| D. | Urine culture |
| Answer» D. Urine culture | |
| 109. |
Vitamin helpful in the process of blood clotting is |
| A. | B-complex |
| B. | C |
| C. | D |
| D. | K |
| Answer» E. | |
| 110. |
In which of the following case a large lattice is formed? |
| A. | Antibody is in excess |
| B. | Antigens and antibodies are in optimal proportion |
| C. | Antigen is in excess |
| D. | None of these |
| Answer» C. Antigen is in excess | |
| 111. |
Which of the following expresses CD3 surface antigen? |
| A. | Granulocytes |
| B. | T cells |
| C. | Monocytes |
| D. | B cells |
| Answer» C. Monocytes | |
| 112. |
Reduction is the |
| A. | loss of proton |
| B. | gain of electron |
| C. | loss of electron |
| D. | gain of protons |
| Answer» C. loss of electron | |
| 113. |
The test (s) based on the principle of toxin neutralization is/are |
| A. | Nagler's reaction |
| B. | Schick test |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 114. |
Which is the most efficient complement fixing class of antibody? |
| A. | IgE |
| B. | IgA |
| C. | IgM |
| D. | IgG |
| Answer» D. IgG | |
| 115. |
The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an example of __________ at work. |
| A. | Shelford's law of tolerance |
| B. | Leibig's law of the minimum |
| C. | the first law of thermodynamics |
| D. | the third law of thermodynamics |
| Answer» D. the third law of thermodynamics | |
| 116. |
Which of the following mediates Type I hypersensitivity reaction? |
| A. | IgE |
| B. | IgG |
| C. | IgM |
| D. | IgD |
| Answer» B. IgG | |
| 117. |
'Entecavir' has no activity against |
| A. | Protease |
| B. | Ligase |
| C. | DNA polymerase |
| D. | Transferase |
| Answer» D. Transferase | |
| 118. |
An approved drug for hepatitis B in adults, known as |
| A. | Entecavir |
| B. | Delavirdine |
| C. | Efavirenz |
| D. | Tenofovir |
| Answer» B. Delavirdine | |
| 119. |
Which of the following proteins would not need localization signal? |
| A. | A nuclear protein |
| B. | A cytosolic protein |
| C. | A protein bound to the endoplasmic reticulum (ER) membrane |
| D. | A cell surface protein |
| Answer» C. A protein bound to the endoplasmic reticulum (ER) membrane | |
| 120. |
'Amantadine' is a |
| A. | 5 ring compound |
| B. | 3 ring compound |
| C. | 6 ring compound |
| D. | 2 ring compound |
| Answer» C. 6 ring compound | |
| 121. |
VDRL test is an example of |
| A. | Tube test |
| B. | Ring test |
| C. | Slide test |
| D. | none of these |
| Answer» D. none of these | |
| 122. |
'Rescriptor' is an alternative name for |
| A. | Abacavir |
| B. | Delavirdine |
| C. | Efavirenz |
| D. | Tenofovir |
| Answer» C. Efavirenz | |
| 123. |
T cell receptors (or TCR) on CD4+ T cells |
| A. | recognize peptides not associated with MHC molecules |
| B. | recognize peptides associated with MHC class I molecules |
| C. | recognize peptides associated with MHC class II molecules |
| D. | are secreted out into the environment to bind antigens |
| Answer» D. are secreted out into the environment to bind antigens | |
| 124. |
Which of the following is correct for CD8 T cells? |
| A. | CD8 T cells only recognize virus-infected cells |
| B. | CD8 T cell receptor recognizes epitopes that are also commonly recognized by B cells |
| C. | In the thymus, CD8 T cells undergo positive selection only, whereas CD4 T cells undergo negative selection only |
| D. | CD8 T cells can kill individual virus-infected cells in a contact dependent fashion |
| Answer» E. | |
| 125. |
Large parasites such as helminthes may be killed extracellularly by the action of |
| A. | basophils |
| B. | monocytes |
| C. | eosinophils |
| D. | neutrophils |
| Answer» D. neutrophils | |
| 126. |
Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated? |
| A. | By rearrangements of the DNA encoding the variable regions of the heavy and light chains |
| B. | By the combination of different heavy and light chains that form the antigen binding site |
| C. | Antibody proteins can physically change their shape to bind different epitopes |
| D. | Both (a) and (b) |
| Answer» E. | |
| 127. |
Which of the following is correct for isoantigens? |
| A. | They are antigens found in all members of different species |
| B. | They are antigens found in some members of a species |
| C. | They are antigens found in all members of a species |
| D. | They are antigens found in some members of different species |
| Answer» C. They are antigens found in all members of a species | |
| 128. |
Passive immunization is done for |
| A. | tuberculosis |
| B. | diphtheria |
| C. | enteric fever |
| D. | all of these |
| Answer» C. enteric fever | |