Question

2.1.2 quiz: protein synthesis
question 8 of 10
which statement correctly compares the structures of dna and rna?
a. dna contains uracil, while rna contains thymine.
b. dna has a deoxyribose backbone, while rna has a ribose backbone.
c. dna is made up of one strand of genetic material, while rna is made up of two strands.
d. rna exists only as strands, while dna can combine with ribosomes.

Explanation:

• Option A: DNA contains thymine, RNA contains uracil. So this option is wrong.
• Option B: DNA has a deoxyribose - phosphate backbone, RNA has a ribose - phosphate backbone. This is correct.
• Option C: DNA is double - stranded, RNA is usually single - stranded. So this option is wrong.
• Option D: RNA can interact with ribosomes during translation, but DNA does not combine with ribosomes in the way described. Also, DNA is double - stranded and has a more complex structure than just being a simple combination with ribosomes. So this option is wrong.

Answer:

B. DNA has a deoxyribose backbone, while RNA has a ribose backbone.