Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Textbook Question
Chapter 25, Problem 6PP
Practice Problem 25.6
(a) There are approximately 3 billion base pairs in the DNA of a single human cell. Assuming that this DNA exists as a double helix, calculate the length of all the DNA contained in a human cell.
(b) The weight of DNA in a single human cell is
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Chapter 25 Solutions
Organic Chemistry
Ch. 25 - Prob. 1PPCh. 25 - Prob. 2PPCh. 25 - Prob. 3PPCh. 25 - Prob. 4PPCh. 25 - Prob. 5PPCh. 25 - Practice Problem 25.6 (a) There are approximately...Ch. 25 - Prob. 7PPCh. 25 - Prob. 8PPCh. 25 - Prob. 9PPCh. 25 - Practice Problem 25.10
The sense strand of a...
Ch. 25 - Practice Problem 25.11
(a) Using the first codon...Ch. 25 - Write the structure of the RNA dinucleotide GC in...Ch. 25 - 25.13 Write the structure of the DNA dinucleotide...Ch. 25 - The example of a silylHilbertJohnson...Ch. 25 - Prob. 15PCh. 25 - Prob. 16PCh. 25 - Research suggests that expression of certain genes...
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- 22-62 Distinguish between intermolecular and intramolecular hydrogen bonding between backbone groups. Where in protein structures do you find one, and where do you find the other?arrow_forwardMust the ratio of guanine to cytosine be 1:1 in RNA? Explain.arrow_forwardThe base composition for one of the strands of a DNA double helix is 19% A, 34% C, 28% G, and 19% T. What is the percent base composition for the other strand of the DNA double helix?arrow_forward
- 22-84 How many different dipeptides can be made (a) using only alanine, tryptophan, glutamic acid, and arginine and (b) using all 20 amino acids?arrow_forward22-20 Show how alanine, in solution at its isoelectric point, acts as a buffer (write equations to show why the pH does not change much if we add an acid or a base).arrow_forward22-49 Based on your knowledge of the chemical properties of amino acid side chains, suggest a substitution for leucine in the primary structure of a protein that would probably not change the character of the protein very much.arrow_forward
- 22-53 Do iron and zinc ions play role in protein structure? If so, what is the role for either or both?arrow_forward22-85 Denaturation is usually associated with transitions from helical structures to random coils. If an imaginary process were to transform the keratin in your hair from an (-helix to a (-pleated sheet structure, would you call the process denaturation? Explain.arrow_forwardUsing the single letter abbreviations A, V, and L, as given in Table 22-1, list the tripeptides formed if alanine, valine, and leucine are all mixed together and peptide bonds are allowed to form in all possible combinations.arrow_forward
- Suppose a long-chain polypeptide is constructed entirely from phenylalanine monomer units. What is its empirical formula? How many amino acids does it contain if its molar mass is 17,500 g mol-1 ?arrow_forwardWhen RNA is hydrolysed, there is no relationship among the quantities ofdifferent bases obtained. What does this fact suggest about the structureof RNA.arrow_forwardErwin Chargaff’s discovery that DNA contains equimolar amounts of guanine and cytosine and also equimolar amounts ofadenine and thymine has come to be known as Chargaff’s rule:G = C and A = T(a) Does Chargaff’s rule imply that equal amounts of guanine and adenine are present in DNA? That is, does G = A?(b) Does Chargaff’s rule imply that the sum of the purine residues equals the sum of the pyrimidine residues? That is,does A + G = C + T?(c) Does Chargaff’s rule apply only to double-stranded DNA, or would it also apply to each individual strand if thedouble helical strand were separated into its two complementary strands?arrow_forward
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