The backbone of dna and rna is composed . dna is double stranded due to interactions between adenine, cytosine, guanine, and thymine, which . uracil is .

The first gap is phosphate sugar skeleton

The second gap is  nitrogenous bases .

The third gap is  nitrogenous base too, found only in RNA.

The skeleton of DNA is the phosphate-sugar succession of which each sugar bears a nitrogenous base.

Nitrogen bases are nitrogenous organic compounds present in nucleic acids in the form of nucleotides in which they are linked to a sugar.

The five main bases are adenine, cytosine, guanine, thymine and uracil.

every el niño cycle is different. every year.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.