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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

Could single-stranded DNA form a stem-loop structure? Why or why not?

What is the meaning of the term genetic material?

The genetic material found within some viruses is single-stranded DNA. Would this genetic material contain equal amounts of \(A\) and \(T\) and equal amounts of \(\mathrm{G}\) and \(\mathrm{C}\) ?

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?

Discuss the differences in the structural features of B DNA and Z DNA.
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