Question

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which statement describes one way that rna differs from dna? one is a protein, and the other is a nucleic acid. one provides energy, and the other carries genetic information. they contain different five - carbon sugars and a different nitrogenous base. they are both carbohydrates, but one is a polysaccharide.

Explanation:

1. Analyze each option:

• Option 1: Both RNA and DNA are nucleic acids, not one being a protein and the other a nucleic acid. So this is incorrect.
• Option 2: Both RNA and DNA are involved in carrying genetic information (DNA stores and transmits, RNA helps in protein synthesis which is based on genetic info). Neither provides energy in the way described. So this is incorrect.
• Option 3: The key difference between RNA and DNA is in their five - carbon sugars (RNA has ribose, DNA has deoxyribose) and one of the nitrogenous bases (RNA has uracil, DNA has thymine). So this option correctly describes a difference.
• Option 4: Both RNA and DNA are nucleic acids, not carbohydrates. So this is incorrect.

Answer:

They contain different five - carbon sugars and a different nitrogenous base.