Question

1. why does hydrogen bonding allow dna to unzip easily? a bonds are weak b bonds are covalent c bonds are metallic d bases separate permanently

Explanation:

Hydrogen bonds are relatively weak compared to covalent or metallic bonds. In DNA, the two strands are held together by hydrogen bonds between complementary base pairs. Since these bonds are weak, it is easier to break them (unzip the DNA) compared to if stronger bonds (like covalent) were holding the strands together. Covalent bonds are strong and not what hold the two DNA strands together. Metallic bonds are not relevant in DNA structure. Also, in DNA replication (when unzipping occurs), the bases do not separate permanently as the DNA strands can re - anneal.

Answer:

A. Bonds are weak