Question

rna strand
dna double helix
nitrogenous bases
a - adenine
t - thymine
g - guanine
c - cytosine
u - uracil
ribose - phosphate backbone
deoxyribose - phosphate backbone
hydrogen bonds between base pairs
what are the main differences between rna and dna? select all that apply.
the 5 - carbon sugar in rna is ribose instead of deoxyribose.
rna has a nitrogenous base called uracil instead of thymine.
rna contains sulfate groups instead of phosphate groups.
rna is usually single - stranded, not double - stranded.

Explanation:

1. Analyze each option:

• Option 1: RNA's 5 - carbon sugar is ribose, DNA's is deoxyribose. This is correct.
• Option 2: RNA has uracil (U), DNA has thymine (T). This is correct.
• Option 3: Both RNA and DNA have phosphate groups, not sulfate groups. This is incorrect.
• Option 4: RNA is usually single - stranded, DNA is double - stranded. This is correct.

Answer:

The correct options are:

• The 5 - carbon sugar in RNA is ribose instead of deoxyribose.
• RNA has a nitrogenous base called uracil instead of thymine.
• RNA is usually single - stranded, not double - stranded.