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- Question
Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive sulphur. At the end of 48 hours, it is expected to find the radioactive label located in
Options- A. DNA
- B. enzymes
- C. RNA
- D. all of these
- Correct Answer
- enzymes
- 1. The bread mold Rhizopus stolonifer belongs to which of the following fungal divisions?
Options- A. Ascomycota
- B. Deuteromycota
- C. Oomycota
- D. Zygomycota Discuss
- 2. Which of the following structure is absent in eukaryotic cells?
Options- A. Mitochondria
- B. Chloroplasts
- C. Golgi structure
- D. Mesosome Discuss
- 3. The inactive protein from of enzyme is
Options- A. apoenzyme
- B. enzyme
- C. haloenzyme
- D. cofactor Discuss
- 4. Coxsackie virus B3, a subgroup of enteroviruses, commonly causes
Options- A. acute hemorrhagic conjunctivitis
- B. muscular dystrophy
- C. myocarditis
- D. gastroenteritis Discuss
- 5. Which of the following plamids do not possess information for self transfer to another cell?
Options- A. Cryptic plasmids
- B. Conjugative plasmids
- C. Non-conjugative plasmids
- D. None of these Discuss
- 6. Colonies resembling molar teeth are produced by
Options- A. Nocardia brasiliensis
- B. N. asteroids
- C. Actinomyces israelii
- D. Actinomadura madurae Discuss
- 7. Anoxygenic photosynthetic bacteria oxidize
Options- A. water
- B. oxgyen
- C. sulfide
- D. ammonia Discuss
- 8. The major route for incorporation of ammonia (NH4+) into organic compounds is via
Options- A. reduction of pyruvate or alpha-ketoglutarate by enzymes
- B. atmospheric nitrogen fixation
- C. oxidation of pyruvate
- D. all of these Discuss
- 9. RNA that is complementary to a segment of another RNA molecule to which it will bind is known as
Options- A. missense RNA
- B. antisense RNA
- C. nonsense RNA
- D. none of these Discuss
- 10. The enzyme that catalyzes the synthesis of DNA is called
Options- A. DNA polymerase
- B. DNA gyrase
- C. DNA ligase
- D. helicase Discuss
More questions
Correct Answer: Zygomycota
Correct Answer: Mesosome
Correct Answer: apoenzyme
Correct Answer: myocarditis
Correct Answer: Non-conjugative plasmids
Correct Answer: Actinomyces israelii
Correct Answer: sulfide
Correct Answer: reduction of pyruvate or alpha-ketoglutarate by enzymes
Correct Answer: antisense RNA
Correct Answer: DNA polymerase
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