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Chapter 9: Problem 20

An organism has a \(\mathrm{G}+\mathrm{C}\) content of \(64 \%\) in its DNA. What are the percentages of \(A, T, G\), and \(C\) ?

Short Answer

Expert verified
\(\%A = \%T = 18\%\) and \(\%G = \%C = 32\%\)

Step by step solution

01

Calculate the percentages of G and C

Given that the percent GC content is 64%, and G and C are equally represented, each makes up half of this total. Therefore, \(\%G = \%C = 64\% / 2 = 32\%\)
02

Calculate the remaining percentage for A and T

The total percent of A, T, G, and C must add up to 100%. Given that the percent GC is 64%, that leaves \(\%A + \%T = 100\% - 64\% = 36\%\) to be divided equally between adenine and thymine.
03

Calculate the percentages of A and T

Given that A and T are equally represented, each makes up half of the remaining total. Therefore, \(\%A = \%T = 36\% / 2 = 18\%\)

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Most popular questions from this chapter

Draw the structure of deoxyribose and number the carbon atoms. Describe the numbering of the carbon atoms in deoxyribose with regard to the directionality of a DNA strand. In a DNA double helix, what does the term antiparallel mean?

In what ways are the structures of an \(\alpha\) helix in a protein and the double helix of DNA similar, and in what ways are they different?

Discuss the structural significance of complementarity in DNA and in RNA.

What are the building blocks of a nucleotide? With regard to the \(5^{r}\) and 3' positions on a sugar molecule, how are nucleotides linked together to form a strand of DNA?

Describe how bases interact with each other in the double helix. This description should include the concepts of complementarity, hydrogen bonding, and base stacking.
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