Question

which statement is true about the dna molecule during transcription?

it unwinds from both ends.

it opens up all of the way, one gene at a time.

only a small area is opened.

it makes a copy of itself.

Explanation:

To determine the true statement about DNA during transcription:

• "It unwinds from both ends" is incorrect; transcription involves local unwinding, not from both ends.
• "It opens up all of the way, one gene at a time" is incorrect; DNA does not fully open for a single gene.
• "Only a small area is opened" is correct. During transcription, RNA polymerase unwinds a small segment (the gene’s promoter region and adjacent DNA) to synthesize mRNA.
• "It makes a copy of itself" describes DNA replication, not transcription.

Answer:

Only a small area is opened.