Which description is true for both dna and rna molecules
a they are types of nucleic acids
b they contain thymine and cytosine
c they are both shaped like helix
d they are double stranded

The correct answer is A.

Both DNA and RNA are types of nucleic acids.  DNA stands for deoxyribonucleic acid , while RNA stands for ribonucleic acid.

Both DNA and RNA carry genetic information. However,  DNA is chiefly responsible for storing and transferring genetic information whereas RNA acts as a messenger between DNA and ribosomes during the process of protein synthesis and directly codes for amino acids.

DNA is double stranded while RNA is single stranded.

DNA has thymine in its structure but RNA does not. Instead in place of thymine it has uracil.

They are types of nucleic acids

Explanation:

Just took the quiz

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

2%? i tried finding the exact sorry if it's not 100% correct ; -;