Question

select all the correct answers. what are two basic differences between dna and rna? rna is usually single stranded, while dna is usually double stranded. rna contains uracil, while dna contains thymine. rna is usually double stranded, while dna is usually single stranded. rna contains thymine, while dna contains uracil. rna doesnt contain cytosine, while dna doesnt contain adenine.

Explanation:

1. RNA is typically single-stranded, while DNA is usually double-stranded.
2. RNA uses uracil as a nitrogenous base, while DNA uses thymine instead.
3. Both RNA and DNA contain cytosine and adenine, so the final option is incorrect. The second option reverses the thymine/uracil relationship.

Answer:

• RNA is usually single stranded, while DNA is usually double stranded.
• RNA contains uracil, while DNA contains thymine.