Question

what are the main differences between rna and dna? select all that apply.
rna contains sulfate groups instead of phosphate groups.
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.

Explanation:

• RNA sugar: RNA has ribose (with an -OH group at the 2' position of the 5 - carbon sugar), while DNA has deoxyribose (with an -H group at the 2' position).
• Nitrogenous base: RNA contains uracil, which pairs with adenine. DNA has thymine (which also pairs with adenine in DNA).
• Strand structure: RNA is typically single - stranded, allowing for various secondary structures like hairpins. DNA is usually double - stranded in a double - helix structure.
• The claim about sulfate groups is incorrect. Both RNA and DNA have phosphate groups in their backbones.

Answer:

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