Question

What do DNA and RNA have in common?

1. the appearance of two complementary strands joined together


2. ribose sugar as part of their structure


3. cytosine and uracil


4. adenine and guanine

Answer 1

3

Both DNA and RNA have four nitrogenous bases each—three of which they share (Cytosine, Adenine, and Guanine) and one that differs between the two (RNA has Uracil while DNA has Thymine). ... One of the most significant similarities between DNA and RNA is that they both have a phosphate backbone to which the bases attach.