DNA methylation is the only known natural modification of DNA. It affects  

A.  adenine bases.
B.  guanine bases.
C.  cytosine bases.
D.  thymine bases.


C.  cytosine bases.

Biology & Microbiology

You might also like to view...

In the absence of a repressor, where will RNA polymerase bind to a prokaryotic operon to initiate transcription?

a. transcriptional start site b. operator c. promoter d. coding region

Biology & Microbiology

Which of the following is responsible for closing off the airway during swallowing?

a. the larynx b. the epiglottis c. the pharynx d. the intercostal muscles

Biology & Microbiology

The theory of chromosomal inheritance was first proposed by

A. Mendel. B. Morgan. C. Sutton. D. Knight. E. Stern.

Biology & Microbiology

What is the correct sequence of organisms if a community is going through secondary succession?a. grasses establish themselves in the communityb. shrubs establish themselves in the communityc. soil formation occursd. trees establish themselves in the community

A. a - b - c - d B. c - a - d - b C. a - c - b - d D. c - a - b - d E. d - c - a - b

Biology & Microbiology