Question

1. what is the major structural difference between dna and rna?

dna is single stranded, while rna is double stranded.
rna is double stranded, while dna is triple stranded.
rna is triple stranded, while dna is double stranded.
dna is double stranded, while rna is single stranded.

Explanation:

DNA (Deoxyribonucleic Acid) has a characteristic double-helical, double-stranded structure, while most RNA (Ribonucleic Acid) molecules are single-stranded, which is a core structural distinction between the two nucleic acids. The other options present incorrect strand configurations for DNA and RNA.

Answer:

DNA is double stranded, while RNA is single stranded.