1. All of the following are non-sense codons except:
- a. UAG
- b. UGA
- c. UAA
- d. AAG
View Answer
D
2. The process of transfer of genetic information from DNA to RNA is known as:
- a. Transformation
- b. Transduction
- c. Transcription
- d. Translation
View Answer
C
3. Which of the following properties may be plasmid mediated?
- a. Resistance to drugs
- b. Enterotoxin production
- c. Lactose fermentation
- d. All of the above
View Answer
D
4. Which of the following enzymes are required for lactose fermentation?
- a. Beta-galactosidase
- b. Galactoside permease
- c. Transacetylase
- d. All of the above
View Answer
D
5. During mutation, when a purine is replaced by pyrimidine and vice-versa, it is named:
- a. Transversion
- b. Transition
- c. Induced mutation
- d. None of the above
View Answer
A
6. During mutation, when one pyrimidine is replaced by another pyrimidine and one purine by another purine, it is named:
- a. Transversion
- b. Transition
- c. Induced mutation
- d. None of the above
View Answer
B
7. Transfer of genetic information through free or naked DNA is called:
- a. Transformation
- b. Transduction
- c. Conjugation
- d. Lysogenic conversion
View Answer
A
8. Transmission of a portion of DNA from one bacterium to another by a bacteriophage is known :
- a. Transformation
- b. Transduction
- c. Conjugation
- d. Lysogenic conversion
View Answer
B
9. The transfer of genetic material from one bacterium to another by mating or contact is called:
- a. Transformation
- b. Transduction
- c. Conjugation
- d. Lysogenic conversion
View Answer
C
10. F factor carrying some chromosomal DNA is named:
- a. F factor
- b. F prime factor
- c. Hfr
- d. Resistance transfer factor
View Answer
B
11. Which of the following factors is responsible for transferable drug resistance in bacteria?
- a. Resistance transfer factor
- b. F factor
- c. Colicogenic factor
- d. All of the above
View Answer
A
12. Resistance transfer factor can be transferred from one bacterium to another by:
- a. Transformation
- b. Transduction
- c. Conjugation
- d. None of the above
View Answer
C
13. Drug resistance in Mycobacterium tuberculosis is due to :
- a. Transformation
- b. Transduction
- c. Conjugation
- d. Mutation
View Answer
D
14. Penicillin resistance is Staphylococcus aureus may be acquired by:
- a. Transformation
- b. Transduction
- c. Conjugation
- d. Mutation
View Answer
B
15. The technique of identifying DNA fragments by DNA: DNA hybridization is called:
- a. Southern blotting
- b. Northern blotting
- c. Western blotting
- d. None of the above
View Answer
A
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Category: Microbiology
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