1.Which is an example of a spontaneous mutation?

A. DNA polymerase inserts a base non-complementary to the template strand

B. A base analog is incorporated into a strand of DNA during replication

C. Cytosine undergoes deamination to produce uracil

D. UV light triggers the formation of pyrimidine dimers

E. A and C

F. B and D

 

2.Which form of DNA transfer is only possible if the donor cell is still alive?  

A. Conjugation

B. Transformation

C. Transduction

 

3.Which system protects bacteria from viral infection?

A. Transposable elements

B. Restriction enzyme-methylase system

C. CRISPR

D. A and B

E. B and C

 

4.Only bacterial genes can be cloned and expressed (transcribed and translated) inside bacterial cells.

T or F

 

5.Which of the following cannot be transferred horizontally through DNA exchange?

A. Antibiotic resistance

B. The ability to perform conjugation

C. Capsule biosynthesis genes

D. All of the above can be horizontally transferred

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