DNA IS TO RNA AS A) GUANINE IS TO URACIL. B) THYMINE IS TO CYTOSIN...

81) DNA is to RNA as

A) guanine is to uracil.

B) thymine is to cytosine.

C) uracil is to thymine.

D) thymine is to uracil.

E) uracil is to guanine.

Answer: D

Diff: 3 Page Ref: 40

Topic: 2.3 Fundamental Genetics

Type: (Conceptual)

Rationale: In order to answer this, students must understand that thymine molecules on strands of DNA

are substituted by uracil molecules on strands of RNA.