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- Question
The presence of viable non-spore forming bacteria in heat process canned foods indicates leakage of the container. Which of the following is responsible for the spoilage of leaky cans?
Options- A. Plant equipment
- B. Cooling water
- C. Highly acidic medium
- D. High sugar content
- Correct Answer
- Cooling water
- 1. B. flavum strain can be used for the production of
Options- A. L-Threonine
- B. L-Proline
- C. L-Isoleucine and L-Histidine
- D. All of the above Discuss
- 2. Proofreading activity to maintain the fidelity of DNA synthesis
Options- A. occurs after the synthesis has been completed
- B. is a function of the 3'-5' exonuclease activity of the DNA polymerases
- C. requires the presence of an enzyme separate from the DNA polymerases
- D. occurs in prokaryotes but not eukaryotes Discuss
- 3. Reverse transcriptase is a useful enzyme to have when
Options- A. an RNA virus converts its RNA to DNA
- B. there are no host cells present
- C. nutrients are scarce
- D. spikes are forming in the new virus Discuss
- 4. Clostridium botulinum food poisoning is due to
Options- A. invasion of bacteria in the intestine
- B. preformed toxin
- C. both (a) and (b)
- D. none of the above Discuss
- 5. Which of the following organism is utilized to obtain commercial L-lysine by direct method?
Options- A. Micrococcus glutamicus
- B. Mutated strain of Micrococcus glutamicus
- C. Brevibacterium aminogenes
- D. Mutated strain of Brevibacterium aminogenes Discuss
- 6. Differentiation of four different bases in automated sequencing systems is that each base has
Options- A. different radioactive tag
- B. cytosine at start
- C. unique antibody bound to it
- D. distinctive fluorescent tag Discuss
- 7. The antibiotics not clinically useful for Pseudomonas aeruginosa infection is
Options- A. aminoglycosides
- B. ceftazidime
- C. piperacillin
- D. trimethoprim-sulphamethoxazole Discuss
- 8. The bacteria which cause(s) tuberculosis in man is/are
Options- A. M bovis
- B. Mycobacterium tuberculosis
- C. M africanum
- D. All of these Discuss
- 9. Which of the following can readily kill Salmonellae?
Options- A. Moist heat at 55°C for 20 min
- B. Moist heat at 55°C for 10 min
- C. Moist heat at 55°C for 30 min
- D. Moist heat at 55°C for 1 hr Discuss
- 10. Which of the following is correct?
Options- A. All members of photolithotrophic autotrophs are also members of algae, but not all members of algae are members of photolithotrophic autotrophs
- B. All members of algae are also members of photolithotrophic autotrophs, but not all members of photolithotrophic autotrophs are members of algae
- C. All members of photolithotrophic autotrophs are members of algae, and all members of algae are members of photolithotrophic autotrophs
- D. No member of photolithotrophic autotrophs is a member of algae Discuss
More questions
Correct Answer: All of the above
Correct Answer: is a function of the 3'-5' exonuclease activity of the DNA polymerases
Correct Answer: an RNA virus converts its RNA to DNA
Correct Answer: preformed toxin
Correct Answer: Mutated strain of Micrococcus glutamicus
Correct Answer: distinctive fluorescent tag
Correct Answer: trimethoprim-sulphamethoxazole
Correct Answer: All of these
Correct Answer: Moist heat at 55°C for 1 hr
Correct Answer: All members of algae are also members of photolithotrophic autotrophs, but not all members of photolithotrophic autotrophs are members of algae
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