Question

question 43
1 pts
the significance of specific base pairing in dna is that
it stabilizes the sugar molecule.
protein copies can be made directly from the dna.
it provides a method for making exact copies of dna.
it prevents errors in dna replication.

Explanation:

• Option 1: Base pairing does not stabilize the sugar molecule. The sugar - phosphate backbone provides structural stability.
• Option 2: Proteins are not made directly from DNA. DNA is first transcribed to RNA, and then RNA is translated to protein.
• Option 3: Specific base pairing (A - T and G - C) allows for semi - conservative replication. Each strand of the original DNA molecule serves as a template. Complementary bases are added according to base - pairing rules, which provides a method for making exact copies of DNA.
• Option 4: While base - pairing has some proof - reading mechanisms (like DNA polymerase's ability to check base pairs), it does not completely prevent errors in DNA replication. There are still possibilities for mutations.

Answer:

it provides a method for making exact copies of DNA.