Question

use information from the lesson and article (transcription and translation on pages 3 and 4, respectively) to answer the question. which statements differentiate dna and rna? select three options. dna is a double helix, and rna is a single strand. dna moves in and out of the nucleus, and rna stays in the nucleus dna is involved only in transcription, and rna is involved in both transcription and translation. dna is involved in both transcription and translation, and rna is involved only in translation. dna does not have uracil as a nitrogen base, but rna does have uracil as a nitrogen base.

Explanation:

1. Analyze each option:

• Option 1: DNA has a double - helix structure, and RNA is typically single - stranded. This is a correct differentiation.
• Option 2: DNA stays in the nucleus (except in some special cases like during cell division in prokaryotes, but generally in eukaryotes), and RNA is synthesized in the nucleus and then moves out to the cytoplasm. So this statement is incorrect.
• Option 3: DNA is the template for transcription (where RNA is synthesized from DNA), and RNA (like mRNA) is involved in translation (where proteins are synthesized from mRNA). So DNA is involved only in transcription (as the template), and RNA is involved in both transcription (as the product) and translation. This is correct.
• Option 4: As explained above, this statement has the roles of DNA and RNA reversed, so it is incorrect.
• Option 5: DNA has thymine as a nitrogen base, while RNA has uracil instead of thymine. So this is a correct differentiation.

Answer:

1. DNA is a double helix, and RNA is a single strand.
2. DNA is involved only in transcription, and RNA is involved in both transcription and translation.
3. DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.