The two strands of the DNA double helix are held together by The two strands of the DNA double helix are held together by hydrogen bonds between nucleotide bases. peptide bonds between nucleotide bases. codons. 5 to 3 attraction.

By hydrogen bonds between nucleotide bases

Explanation:

A DNA molecule is a double-stranded molecule that is informing one structure two strands of nucleotide are involved.

The double-stranded molecule backbone is composed of the phosphate and sugar group and the inside of the backbone are presents the nitrogenous bases. The nitrogenous bases are of four types which are: adenine, cytosine, guanine, and thymine.

These nitrogenous bases are attached according to the Chargaff rule that is adenine binds thymine and cytosine binds guanine. These bases bind with the help of the hydrogen bond as 2 hydrogens participate between adenine and thymine and 3 hydrogens participate between cytosine and guanine.

Thus, hydrogen bonds between nucleotide bases is correct.

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a