What do a DNA molecule and an RNA molecule have in common?
A. Both are single stranded.
B. Both are double stranded.
C. Both contain the nitrogen base uracil.
D. Both contain the nitrogen base adenine.

D

Explanation:

DNA is double stranded and rNA is a single stranded copy of this but T (Thymine) is replaced by U (Uracil). This is done via the biological process of transcription, where a ribosome copies DNA to make this single stranded rNA.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

it means there are 3 atoms of oxygen