GENETICS(LL)-W/CONNECT >CUSTOM<
6th Edition
ISBN: 9781260571561
Author: HARTWELL
Publisher: MCG CUSTOM
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Textbook Question
Chapter 6, Problem 5P
If 30% of the bases in human DNA are A, (a) what percentage are C? (b) What percentage are T? (c) What percentage are G?
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Which of the following statements is (are) true? (a) The two strands of DNA run parallel from their 5' to their 3' ends. (b) An adenine–thymine base pair contains three hydrogen bonds. (c) Positively charged counterions are associated with DNA. (d) DNA base pairs are always perpendicular to the helix axis
(a) What is meant by the term base pairing?(b) Which bases pair with which other bases?(c) How many hydrogen bonds does each base pair have?
If the GC content of a DNA molecule is 60%, what are the molar percentages of the four bases (G, C, T, A)?
Chapter 6 Solutions
GENETICS(LL)-W/CONNECT >CUSTOM<
Ch. 6 - Griffith, in his 1928 experiments, demonstrated...Ch. 6 - Griffith, in his 1928 experiments, demonstrated...Ch. 6 - During bacterial transformation, DNA that enters a...Ch. 6 - Nitrogen and carbon are more abundant in proteins...Ch. 6 - If 30 of the bases in human DNA are A, a what...Ch. 6 - Which of the following statements are true about...Ch. 6 - Imagine you have three test tubes containing...Ch. 6 - What information about the structure of DNA was...Ch. 6 - A portion of one DNA strand of the human gene...Ch. 6 - When a double-stranded DNA molecule is exposed to...
Ch. 6 - A particular virus with DNA as its genetic...Ch. 6 - The underlying structure of DNA is very simple,...Ch. 6 - Prob. 13PCh. 6 - Bacterial transformation and bacteriophage...Ch. 6 - The CAP protein is shown bound to DNA in Fig....Ch. 6 - In Meselson and Stahls density shift experiments...Ch. 6 - When Meselson and Stahl grew E. coli in 15N medium...Ch. 6 - If you expose human tissue culture cells for...Ch. 6 - Draw a replication bubble with both replication...Ch. 6 - a. Do any strands of nucleic acid exist in nature...Ch. 6 - As Fig. 6.21 shows, DNA polymerase cleaves the...Ch. 6 - The bases of one of the strands of DNA in a region...Ch. 6 - Replicating structures in DNA can be observed in...Ch. 6 - Indicate the role of each of the following in DNA...Ch. 6 - Draw a diagram of replication that is occurring at...Ch. 6 - Figure 6.18 depicts Watson and Cricks initial...Ch. 6 - Researchers have discovered that during...Ch. 6 - A DNA synthesizer is a machine that uses automated...Ch. 6 - Bacterial cells were coinfected with two types of...Ch. 6 - A yeast strain with a mutant spo11- allele has...Ch. 6 - Imagine that you have done a cross between two...Ch. 6 - The Neurospora octad shown came from a cross...Ch. 6 - From a cross between e f g and e f g strains of...Ch. 6 - In Step 6 of Fig. 6.27, the resolvase enzyme...Ch. 6 - Figure 6.31shows four potential outcomes of...Ch. 6 - Each of the substrates for site-specific...Ch. 6 - Prob. 37PCh. 6 - Suppose that you could inject a wild-type mouse...Ch. 6 - C31 is a type of bacteriophage that infects...Ch. 6 - Cre is a recombinase enzyme encoded by a gene in...Ch. 6 - Like Cre/loxP recombination, site-specific...
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- The base composition of one of the DNA chains of a DNA double helix contains 18 mol-%A, 35 mol-%T, 26 mol-%C, and 21 mol-%G (a) What is the base composition of the complementary DNA chain? (b) Is the total amount of purine bases equal to the total amount of pyrimidine bases for the DNA double helix?arrow_forwardThe variable structures of a nucleotide are the sugar and the phosphate group. (a). Say if the statement written above is true or false. (b). Give ONE reason for your answer in part (a).arrow_forwardThe composition (in molefraction units) of one of the strands of a double-helical DNA molecule is [A] = 0.30 and [G] =0.24. (a) What can you say about [T] and [C] for the same strand? (b) What can you say about [A], [G], [T], and [C] of the complementary strand?arrow_forward
- 1. a) What does DNA stand for? b)What is the name of the DNA structure?arrow_forwardAnswer D E and F d) in base pairing, why do we never see AG, GA, CT or TC forming complementary base pairs? e) why is vegetarianism a more energy intensive process (from the organism standpoint) than being omnivores? [DON'T EVEN THINK OF STATING ANYTHING ABOUT FIBER, BULK, AND/OR CELULOSE!!!!] f) why is significant serum (in the bloodstream) cholesterol reduction so difficult, and why do most of the drugs designed to reduce cholesterol target the liver?arrow_forwardTRUE OR FALSE a) The 2 chains composing one double helix run in opposite directions; they are antiparallel (one is 5’->3’ and the other 3’->5’). b) DNA molecules can perform their function in replication and transcription as long as the hydrogen bonds between the bases remain intact.arrow_forward
- How do these ratios compare with the (A + G)/(T + C) ratio found in DNA? Explain.arrow_forward1) How many bases are found (on one of the strands) in a single twist of a DNA helix: a) 3.4 b) 10 c) 2 d) 0.34 2)Which of the following is a correct representation of a segment of DNA: a) I b) I and III c) IV and V d) V and I 3)Consider the following sequence: 5' - AUGGCUACAGAUAGCUGGGGCUGAAAAAAAAAAAAAAA..3'Translated, the corresponding protein contains how many amino acids: a) 6 b) 7 c) 8 d) 13arrow_forwardThe A and G compositions (mole percent) of one of the strands of a duplex DNA is A = 27 and G = 30. (a) What would be the T and C compositions of the complementary strand? (b) What can be said about the A and G compositions of its complementary strand?arrow_forward
- Moira, a biochemistry major, wanted to explore the shapes a single-stranded DNA molecule can take. She sketched the two shapes below. Her professor was impressed with Moira’s imagination and artistic ability, but she informed Moira that only one of her sketches was feasible. In the sketches, the lines indicate complementary base pairing. (d) Would a new double-stranded molecule assume the shape similar to one in the drawing? (e) Why or why not?arrow_forwardIf a DNA molecule has (C+T)/(G+A)=1.95, what can you conclude about the structure of this DNA?arrow_forwardIf a DNA double helix contains 28% T nucleotides, then what is the percentage of A nucleotides?arrow_forward
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