Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 15.1, Problem 4R
Summary Introduction
To review:
The reason for the involvement of G–C (guanine–cytosine) base pairs in many mutations.
Introduction:
DNA (deoxyribonucleic acid) is composed of two types of nitrogen-containing base, called purines and pyrimidines. The purines involve adenine and guanine and pyrimidines involve thymine and cytosine. Adenine joins with thymine and guanine joins with cytosine.
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Life: The Science of Biology
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- What is is the addition of one or more nucleotide pairs?arrow_forwardIn a segment of DNA consisting of 1000 nitrogen bases, 28% of which are thymine, how many bases are adenine, guanine, and cytosine?arrow_forwardIs it possible to have a mutation in nucleotide four that would produce the same amino acid? If yes provide an example.arrow_forward
- In a single strand of DNA, is it ever possible for the number of adenines to be greater than the number of thymines? Describearrow_forwardWhat role does complementary base pairing play in thereplication of DNA?arrow_forwardWhy is it necessary for naturally occurring DNA molecules to be negatively supercoiled?arrow_forward
- Why Is DNA Twisted?arrow_forwardA gene contains 141 codons. How many nucleotides are present in the gene’s coding sequence? How many amino acids are expected to be present in the polypeptide encoded by this gene?arrow_forwardWhy are there nucleotides (A, T, G, and C) in the master mix? What are the other components of the master mix, and what are their functions?arrow_forward
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