How does DNA contribute to tissue repair?

How does DNA contribute to tissue repair?

• A. DNA ensures that replaced cells carry the same genetic information.
• B. DNA breaks down damaged tissue.
• C. RNA carries information.
• D. DNA becomes enzymes.

Answer: (A)

DNA provides the blueprint that is faithfully copied when cells divide. In tissue repair, cells near the injury multiply to replace lost cells, and each new cell needs the same genes to produce the proteins and structural components required for proper tissue function. By duplicating and passing along the full genetic information to daughter cells, DNA ensures that the repaired tissue contains cells with the correct genetic instructions. RNA plays a downstream role in turning those instructions into proteins, but DNA’s key contribution is preserving the genetic information across cell divisions. DNA doesn’t break down tissue, and it isn’t an enzyme, so those ideas don’t explain how repair happens as effectively. This is why the idea that DNA ensures replaced cells carry the same genetic information is the best answer.

DNA provides the blueprint that is faithfully copied when cells divide. In tissue repair, cells near the injury multiply to replace lost cells, and each new cell needs the same genes to produce the proteins and structural components required for proper tissue function. By duplicating and passing along the full genetic information to daughter cells, DNA ensures that the repaired tissue contains cells with the correct genetic instructions. RNA plays a downstream role in turning those instructions into proteins, but DNA’s key contribution is preserving the genetic information across cell divisions. DNA doesn’t break down tissue, and it isn’t an enzyme, so those ideas don’t explain how repair happens as effectively. This is why the idea that DNA ensures replaced cells carry the same genetic information is the best answer.