Which statement about the incorporation of a nucleotide into DNA is true? A. Before incorporation into...

Which statement about the incorporation of a nucleotide into DNA is true?

A. Before incorporation into DNA, nucleotides are in their tri-phosphate form.

B. The nitrogenous base in the nucleotide determines the orientation of the phosphate residues.

C. The nucleotide that has been incorporated into a DNA molecule has three phosphate groups.

D. The sugar (ribose or deoxyribose) determines the number of phosphate residues.

Solutions

Expert Solution

Incorporation of nucleotide means addition of nucleotide in the DNA molecule. A nucleotide consists of N2 base, deox-ribose sugar and phosphate group. Whent e nucleotides are incorporated in to DNA, they have a single phosphate group.Ribose or de-oxy ribose has no effect on number of phosphate group.Orientation of the phosphate group is determined by the sugar molecule. Before the incorporation of nucleotide in to DNA, they are in their tri-phosphate form. With i the nucleoplasm there are nucleotides present in their tri-phosphate form. When they get incorporated in to DNA, they loose two of their phosphate groups.

A is the right option.

gladiator answered 1 year ago

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