Part C The two strands of a DNA double helix are held together by that form betw

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Part C The two strands of a DNA double helix are held together by that form between pairs of nitrogenous bases covalent bonds O hydrophilic interactions O hydrogen bonds O S-S bonds O ionic bonds Submit Request Answer Part D A nucleotide is composed of a(n) phosphate group, a nitrogen-containing base, and a five-carbon sugar O phosphate group, a nitrogen-containing base, and a hydrocarbon O glycerol, a nitrogen-containing base, and a five-carbon sugar amino group, a nitrogen-containing base, and a five-carbon sugar sulfhydryl group, a nitrogen-containing base, and a five-carbon sugar Submit Request Answer

Explanation / Answer

Part C:

The two strands of a DNA double helix are held together by hydrogen bonds that form between pairs of nitrogenous bases.

The nitrogen bases present on one strand,pair with the nitrogen bases of opposite strand.Purine base Adenine always pairs with pyrimidine base Thymine by two hydrogen bonds and the purine base Guanine always pairs with pyrimidine base Cytosine with three hydrogen bonds.This pairing is termed as complementary base pairing.

Purine:Pyrimidine

Part D:

A nucleotide is composed of a phosphate group,a nitrogen containing base and a five carbon sugar.

Nucleotides are the structural units of nucleic acids.If the sugar is ribose,it is called ribonucleotide and if the sugar is deoxyribose,it is called as deoxyribonucleotide.

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