Question

select the true statements. rna has a double-helix structure. dna is primarily found in the cytoplasm. rna helps carry out genetic instructions from dna. dna is typically a single-stranded molecule.

Explanation:

• "RNA has a double - helix structure": Incorrect. RNA is usually single - stranded, while DNA has a double - helix structure.
• "DNA is primarily found in the cytoplasm": Incorrect. DNA is mainly located in the nucleus of eukaryotic cells (and in the nucleoid region of prokaryotic cells), while RNA is more common in the cytoplasm.
• "RNA helps carry out genetic instructions from DNA": Correct. RNA (like mRNA, tRNA, rRNA) is involved in processes like transcription and translation to implement the genetic information stored in DNA.
• "DNA is typically a single - stranded molecule": Incorrect. DNA is typically double - stranded with a double - helix structure.

Answer:

RNA helps carry out genetic instructions from DNA.