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 4.1, Problem 2R
Summary Introduction
To review:
The diversity in deoxyribonucleic acid (DNA) molecules even when they have structural similarity.
Introduction:
DNA shows a wide variety of structures like, hairpin, stem loop, and tertiary. The variety of structures formed by DNA molecules is the result of difference in the sequence or arrangement of
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Chapter 4 Solutions
Life: The Science of Biology
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- How is it that protein–protein interactions thatare too weak to cause proteins to assemble in solutioncan nevertheless allow the same proteins to assemble intocomplexes on DNA?arrow_forwardAll the following statements about DNA are true, EXCEPT: O DNA is a double-helix, consisting of a sugar-phosphate backbone. O DNA is made up on nucleotides, which consist of one sugar, one phosphate, and one base. O DNA consists of 4 bases - adenine, uracil, cytosine, and guanine. The two main functions of DNA are to replicate itself and to create proteins (by providing the template for protein synthesis). O The sugar in DNA is deoxyribose.arrow_forwardLet’s suppose you have recently identified an organism that wasscraped from an asteroid that hit the earth. (Fortunately, no onewas injured.) When you analyze this organism, you discover thatits DNA is a triple helix, composed of six different nucleotides: A,T, G, C, X, and Y. You analyze the composition of the DNA andfind the following amounts of the six bases: A = 24%, T = 23%,G = 11%, C = 12%, X = 21%, Y = 9%. What rules would you proposethat govern triplex-DNA formation in this organism? Note: There is more than one possibility.arrow_forward
- During the synthesis of a DNA molecule, nucleotides are added sequentially to the growing DNA molecule via bonds between the previously added nucleotide and the next nucleotide. The figure below illustrates a partial strand of a DNA molecule. W, X, Y, and Z denote differ- ent chemical bonds on the DNA strand. 5' end OH 0-P-0 A W B X с o Y 0 3' end The molecular structure of a DNA strand D Z OP 0 0X CH, -0- Which of the four labeled bonds was last to form during DNA synthesis? W CH, OHarrow_forwardIf one DNA strand is 5′–GGCATTACACTAGGCCT–3′, what is the sequence of the complementary strand?arrow_forwardWhy is DNA so importantarrow_forward
- How many different DNA strands composed of 100 nucleotides could possibly exist?arrow_forwardWhere do DNA molecules store biological information?arrow_forwardDescribe the structure of DNA. Where are the bases,sugars, and phosphates in the structure? Which basesare complementary to one another? How are they heldtogether in the double helix of DNA?arrow_forward
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