Biology Practice Problems Nucleic Acids Practice Problems Solution: Adenine makes up 22% of the nucleotides in a parti...

Solution: Adenine makes up 22% of the nucleotides in a particular sample ofgenomic DNA. What percentage of the nucleotides in this sample are guanine?A. 18B. 22C. 28D. 32E. Can't tell from the information provided

Problem

Adenine makes up 22% of the nucleotides in a particular sample ofgenomic DNA. What percentage of the nucleotides in this sample are guanine?

A. 18

B. 22

C. 28

D. 32

E. Can't tell from the information provided

Solution

Nucleic acids are polynucleotides with building blocks that are made of a nitrogenous base, a pentose, and a phosphate group. RNA makes use of the pentose, ribose, while DNA uses deoxyribose. In addition to this, DNA is also know for its usual double-stranded character, the nucleotide bases pair up based on complementarity. Because of this feature, the DNA composition of a particular double-stranded DNA can be determined with just one component.

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