Which molecule is described as double-stranded and capable of replicating?

Which molecule is described as double-stranded and capable of replicating?

• A. DNA
• B. RNA
• C. Proteins
• D. Lipids

Answer: (A)

DNA stores genetic information in a stable double-stranded form that can be accurately copied. The double helix provides a built-in template: each strand pairs with its complement (A with T, G with C), so enzymes can separate the strands and synthesize a new complementary strand on each, producing two identical DNA molecules in a semi-conservative process. This replication mechanism is central to how genetic information is passed on during cell division. RNA is usually single-stranded and acts in other roles, proteins do not carry hereditary information or replicate themselves, and lipids don’t store genetic data or replicate. So the molecule described as double-stranded and capable of replicating is DNA.

DNA stores genetic information in a stable double-stranded form that can be accurately copied. The double helix provides a built-in template: each strand pairs with its complement (A with T, G with C), so enzymes can separate the strands and synthesize a new complementary strand on each, producing two identical DNA molecules in a semi-conservative process. This replication mechanism is central to how genetic information is passed on during cell division. RNA is usually single-stranded and acts in other roles, proteins do not carry hereditary information or replicate themselves, and lipids don’t store genetic data or replicate. So the molecule described as double-stranded and capable of replicating is DNA.