Question

Select the true statement.

RNA is mostly single-stranded; DNA is always double-stranded.
RNA and DNA usually have identical nitrogenous bases.
Several types of DNA help regulate protein synthesis.

Answer 1

RNA is mostly single-stranded; DNA is always double-stranded.

Step-by-step explanation:

DNA stores the genetic information that codes for the way protein should be developed by the cell. Protein determines the trait (phenotype) of the cell/organism. RNA is used as an intermediary between DNA and proteins. RNA is made of ribonucleic acids while DNA is made of deoxyribonucleic acids.