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- Question
The reaction(s) that is/are usually positive in Escherichia coli, is/ are
Options- A. Glucose fermentation
- B. Indole reaction
- C. Methyl red reaction
- D. All of these
- Correct Answer
- All of these
- 1. Why Deinococcus radiodurans is able to survive massive exposure to radiation?
Options- A. Because it produces a thick shell which acts as a shield from the radiation
- B. Because it has unique DNA repair mechanisms
- C. Because its cellwall contains radioactive elements
- D. Because it has many copies of genes encoding DNA repair Discuss
- 2. The uncontrolled proliferation of cells is termed as
Options- A. hyperplasia
- B. anaplasia
- C. metastasis
- D. all of these Discuss
- 3. The Acrasiomycota differ from the Myxomycota
Options- A. in their mode of nutrition
- B. in their cellular organization
- C. Both (a) and (b)
- D. none of the above Discuss
- 4. Bacitracin, an antibiotic similar to penicillin, is produced by
Options- A. Bacillus polymyxa
- B. Streptomyces erythreus
- C. Bacillus licheniformis
- D. Aspergillus fumigatus Discuss
- 5. The nonsymbiotic bacteria which fix nitrogen live in the soil independently are
Options- A. Azotobacter
- B. Clostridium
- C. considerably less important in comparison to the symbiotic bacteria
- D. all of the above Discuss
- 6. The biotin level in obtaining L-gluatmic acid by fermentation using Micrococcus glutamicus is critical because
Options- A. too low level prevents growths, hence L-glutamic acid production
- B. too high level prevents L-glutamic acid production
- C. both (a) and (b)
- D. none of the above Discuss
- 7. The interaction between the mRNA and tRNA determined the position of amino acid in a polypeptide sequence. This is called the
Options- A. stagerivity
- B. Wobble hypothesis
- C. promiscuity
- D. adaptor hypothesis Discuss
- 8. Which of the following may be most likely to be missing from a gram-positive bacterium?
Options- A. Penicillin binding protein
- B. Peptidoglycan
- C. Lipopolysaccharide
- D. Phospholipid bilayer membrane Discuss
- 9. The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called
Options- A. vitropexis
- B. viropexis
- C. ectodesmata
- D. vivopexis Discuss
- 10. 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
More questions
Correct Answer: Because it has many copies of genes encoding DNA repair
Correct Answer: hyperplasia
Correct Answer: in their cellular organization
Correct Answer: Bacillus licheniformis
Correct Answer: all of the above
Correct Answer: both (a) and (b)
Correct Answer: adaptor hypothesis
Correct Answer: Lipopolysaccharide
Correct Answer: viropexis
Correct Answer: All of the above
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