Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 12PDQ
Adenine may also be named 6-amino purine. How would you name the other four nitrogenous bases, using this alternative system? (O is indicated by “oxy-,” and CH3 by “methyl.”)
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Adenine may also be named 6-amino purine. How would you name the other four nitrogenous bases, using this alternative system? (O is indicated by “oxy-,” and CH3 by “methyl.”)
5-Bromouridine is known to induce mutations in DNA. One of the characteristics of this compound is that the enol form is favored relative to the keto form. Draw the keto- and the eno- tautomers of the base. Determine (and draw) which base (A, T, G, or C) would most likely interact with each of the two forms by base-pair.
Identify the following amino acid at pH = 7 (aqueous form): (COO-)–CH(NH3+)–CH2–(COO-)
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Chapter 10 Solutions
Concepts of Genetics (12th Edition)
Ch. 10 - Would an experiment similar to that performed by...Ch. 10 - In sea urchin DNA, which is double stranded, 17.5...Ch. 10 - German measles results from an infection of the...Ch. 10 - What vital clues were provided by Franklins work...Ch. 10 - Was it ethical for Wilkins to show Franklins...Ch. 10 - Prob. 3CSCh. 10 - HOW DO WE KNOW? In this chapter, we first focused...Ch. 10 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 10 - Discuss the reasons proteins were generally...Ch. 10 - Contrast the contributions made to an...
Ch. 10 - When Avery and his colleagues had obtained what...Ch. 10 - Why were 32P and 35S chosen for use in the...Ch. 10 - Does the design of the HersheyChase experiment...Ch. 10 - What observations are consistent with the...Ch. 10 - What are the exceptions to the general rule that...Ch. 10 - Draw the chemical structure of the three...Ch. 10 - How are the carbon and nitrogen atoms of the...Ch. 10 - Adenine may also be named 6-amino purine. How...Ch. 10 - Draw the chemical structure of a dinucleotide...Ch. 10 - Describe the various characteristics of the...Ch. 10 - What evidence did Watson and Crick have at their...Ch. 10 - What might Watson and Crick have concluded had...Ch. 10 - How do covalent bonds differ from hydrogen bonds?...Ch. 10 - List three main differences between DNA and RNA.Ch. 10 - What are the three major types of RNA molecules?...Ch. 10 - How is the absorption of ultraviolet light by DNA...Ch. 10 - What is the physical state of DNA after it is...Ch. 10 - What is the hyperchromic effect? How is it...Ch. 10 - Why is Tm related to base composition?Ch. 10 - What is the chemical basis of molecular...Ch. 10 - What did the WatsonCrick model suggest about the...Ch. 10 - A genetics student was asked to draw the chemical...Ch. 10 - Considering the information in this chapter on B-...Ch. 10 - One of the most common spontaneous lesions that...Ch. 10 - In some organisms, cytosine is methylated at...Ch. 10 - Because of its rapid turnaround time, fluorescent...Ch. 10 - Prob. 31ESPCh. 10 - Newsdate: March 1, 2030. A unique creature has...Ch. 10 - During gel electrophoresis, DNA molecules can...Ch. 10 - DNA and RNA are chemically very similar but are...Ch. 10 - Electrophoresis is an extremely useful procedure...
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- There are a total of six different amino acid sequences for a tripeptide containing one molecule each of serine, valine, and glycine. Using three-letter abbreviations for the amino acids, draw the six possible sequences of amino acids.arrow_forwardA) Draw the "standard" base pairs (A:T and G:C) but instead of using the most common form of each base, use the uncommon tautomer form of each base (i.e. imino A, imino C, enol G, enol T). Clearly indicate hydrogen bonds (an arrow from donor to acceptor will suffice). Be sure to include the “R” representing the pentose. B) The G:U "wobble" base pair can be formed between the most common tautomer forms of G & U. Another base pair with the same geometry/pairing/orientation can be formed between G & T. Can you create a "wobble" base pair between the uncommon enol tautomer forms of G & T? Like the "wobble" G:U base pair in the Lecture 1 slides, this enol-based "wobble" G:T base pair must have at least two hydrogen bonds. If possible, draw such a base pair, and note any important differences from the non-enol G:U/T wobble. If it is not possible to draw such a base pair, explain why.arrow_forwardThe bacterially produced antibiotic gramicidin A forms channels in cell membranes that allow the free diff usion of Na+ and K+ ions, thereby killing the cell. This peptide consists of a sequence of Dand L-amino acids. The sequence of a segment of fi ve amino acids in gramicidin A is R-Gly-L-Ala-D-Leu-L-Ala-D-Val-R′. Complete the Fischer projection below by adding the correct group to each vertical bond.arrow_forward
- Histidine is an amino acid with three titratable groups: an -NH3+ group (pKa = 9.2), a -COOH group (pKa = 1.8), and an imidazole (amine-like) group (pKa = 6.0). The titration curve for histidine is shown below with four points highlighted. (a) Identify which point on the titration curve corresponds to the pKa for each of the titratable groups, and which point corresponds to the pI. Explain your choices. (b) Calculate the value of pI for histidinearrow_forwardGiven the structures of the ribonucleotides as (shown in Image A) and deoxyribonucleotides (as shown in Image B), Draw the structure of the polyribonucleotide UAGCCUG and the structure of thepolydeoxyribonucleotide CGTAGAT.arrow_forwardAfter a polypeptide chain has been synthesized, certain amino acids in the peptide may become modified. For each modified amino acid, identify the standard amino acid from which it is derived. Enter the unabbreviated name of the standard amino acid. OH I *NH,CH,–C–CH,CH,—CH–COO H C *NH₂ standard amino acid: Identify the modification that yields the first amino acid depicted. addition of a hydroxyl group addition of an amino group modification of the existing amino group modification of the existing hydroxyl group elongation of the side chain by the addition of a -CH₂- grouparrow_forward
- A nucleoside consists of an organic base, bound to ribose or deoxyribose. Draw the structure for deoxyguanosine, formed from guanine and deoxyribose.arrow_forwardDraw a structural formula for the b-N-glycoside formed between 2-deoxy- d-ribofuranose and adenine.arrow_forwardWhy exactly are the bases T-G or A-C not complementary?arrow_forward
- Indicate all the possible sequences for a tripeptide containing alanine, glutamine, and methionine; use the standard abbreviation for each amino acid (Ala, Gln, Met).arrow_forwardName the following nucleotide: HN -0-P -0-CH2 OHarrow_forwardThere are 20 standard amino acids and only 10 major monosaccharides in eukaryotes, yet there are so many more possible combinations of monosaccharides in a hexasaccharide than amino acids in a hexapeptide. Explain this observation.arrow_forward
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