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- Question
Which of the following tests is used to determine the minimal lethal concentration?
Options- A. Broth dilution test
- B. Agar dilution test
- C. Dilution susceptibility tests
- D. All of these
- Correct Answer
- All of these
- 1. Numerous antibodies can be prepared, against one antigen, each binds to unique epitopes. How is this antibody diversity generated?
Options- 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) Discuss
- 2. Aerobic respiration differs from anaerobic respiration in which of the following respects?
Options- A. Anaerobic respiration is glycolysis
- B. Aerobic respiration requires the electron transport chain
- C. The final electron acceptors are different
- D. Aerobic respiration produces less ATP Discuss
- 3. Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on
Options- A. chromosome 21 in man, chromosome 6 in mice
- B. chromosome 6 in man, chromosone 21 in mice
- C. chromosome 17in man, chromosome 6 in mice
- D. chromosome 6 in man, chromosome 17 in mice Discuss
- 4. Which of the following is accomplished in chemiosmosis?
Options- A. The oxidation of ATP
- B. The oxidation of water
- C. The oxidation of NADH
- D. The oxidation of CO2 Discuss
- 5. Which of the following species can cause bitterness, acidity and curdling in canned milk, cream and evaporated milk?
Options- A. Bacillus
- B. Clostridium
- C. both (a) and (b)
- D. Saccharomyces Discuss
- 6. A quorum sensing system
Options- A. detects a signal from the external environment
- B. senses a compound produced by the bacterium itself
- C. consists of a sensor component that phosphorylates a regulatory protein
- D. controls the activity of ribosomes directly Discuss
- 7. Interference mechanism of ciprofloxacin and norfloxacin is due to their action on
Options- A. cell wall synthesis
- B. cell membrane function
- C. DNA function
- D. protein synthesis Discuss
- 8. Hyphomycete fungi
Options- A. produce nonmotile tetaradiate conidia
- B. grow in leaves and the infected leaves are the preferred food source for some aquatic insects
- C. both (a) and (b)
- D. none of the above Discuss
- 9. Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?
Options- A. Both organisms are gram-positive spore formers
- B. Diphtheria toxin and edema toxin are ADP ribosylating toxins
- C. The most serious disease symptoms are the direct result of toxin action
- D. Both organisms cause skin and respiratory tract infections Discuss
- 10. Phosphate regulation has been observed in the production of
Options- A. alkaloids
- B. antibiotics
- C. gibberelins
- D. all of these Discuss
More questions
Correct Answer: Both (a) and (b)
Correct Answer: The final electron acceptors are different
Correct Answer: chromosome 6 in man, chromosome 17 in mice
Correct Answer: The oxidation of NADH
Correct Answer: Bacillus
Correct Answer: senses a compound produced by the bacterium itself
Correct Answer: DNA function
Correct Answer: both (a) and (b)
Correct Answer: The most serious disease symptoms are the direct result of toxin action
Correct Answer: all of these
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