Question

dna molecules consist of...
old strand and one new strand

two old strands

two new strands

Explanation:

The question asks about the composition of DNA molecules. The correct option is missing from the visible choices (the standard answer is "one old strand and one new strand" for semi-conservative replication, but it's not fully displayed here). However, among the visible options, none are correct. Wait, no—wait, the red option is cut off: "old strand and one new strand" (likely "one old strand and one new strand"). If that's the case, that's the correct answer.

Answer:

The red option: old strand and one new strand (assuming it's "one old strand and one new strand")