Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 16, Problem 7TYK
In their classic experiment, Meselson and Stahl
- a. provided evidence for the semiconservative model of
DNA replication. - b. were able to separate phage protein coats from E. coli by using a blender.
- c. found that DNA labeled with 15N was of intermediate density.
- d. found that DNA composition was species specific.
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Which of the following statements BEST DESCRIBES the main findings of the Meselson-Stahl experiment?
A.
DNA can be separated using centrifugation
B.
The semiconservative model of DNA replication is more accurate than the dispersive or conservative models of DNA replication
C.
Using 14N in experiments is an effective way of tracking nitrogen molecules
D.
Bacteria grown in the presence of a heavier nitrogen isotope (15N) will replicate at a slower rate than those that utilise a lighter nitrogen isotope (14N)
E.
Both strands of each new DNA double helix are brand new and synthesized from individual nucleotides
Suppose the experiment of Meselson and Stahl was performed on a sample of 8 cells, each containing one copy of its circular double-stranded DNA genome, and that had been growing on normal 14N medium. You then grew the cells for 3 generations in medium containing 15N. The outcome would be
A) 8 cells with single-stranded DNA molecules with 14N, and 24 cells with single-stranded DNA molecules with 15N. B) 16 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 48 cells with double-stranded DNA molecules with 15N. C) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 24 cells with double-stranded DNA molecules with 15N. D) 8 cells with double-stranded DNA molecules with equal amounts of 14N and 15N, and 32 cells with double-stranded DNA molecules with 15N. E) 65 cells with single-stranded DNA molecules with 15N.
Meselson and Stahl grew bacteria in medium containing heavy nitrogen. After many celldivisions, the bacteria were removed, washed and allowed to continue growth in mediumcontaining normal (light) nitrogen.a. In this experiment, what part of the DNA gets labeled with heavy nitrogen?
Chapter 16 Solutions
Study Guide for Campbell Biology
Ch. 16 - Hershey and Chase devised an experiment using...Ch. 16 - Review the structure of DNA by labeling the...Ch. 16 - Using different colors for heavy (parental) and...Ch. 16 - Look back to Interactive Question 16.2 and label...Ch. 16 - In this diagram of bacterial DNA replication,...Ch. 16 - Draw the last Okazaki fragment being formed on the...Ch. 16 - List the successive levels of packing in a...Ch. 16 - Prob. 1SYKCh. 16 - Prob. 2SYKCh. 16 - One of the reasons most scientists thought...
Ch. 16 - Transformation involves a. the uptake of external...Ch. 16 - Prob. 3TYKCh. 16 - Which of the following most closely represents...Ch. 16 - Prob. 5TYKCh. 16 - Prob. 6TYKCh. 16 - In their classic experiment, Meselson and Stahl a....Ch. 16 - The joining of nucleotides in the polymerization...Ch. 16 - DNA polymerase is not able to begin copying a DNA...Ch. 16 - Prob. 10TYKCh. 16 - Prob. 11TYKCh. 16 - Prob. 12TYKCh. 16 - Which of the following is least related to the...Ch. 16 - Prob. 14TYKCh. 16 - Prob. 15TYKCh. 16 - Prob. 16TYKCh. 16 - Prob. 17TYKCh. 16 - Which of the following statements about telomeres...Ch. 16 - You are trying to test your hypothesis that DNA...Ch. 16 - Given the experimental procedure explained in...Ch. 16 - Prob. 21TYKCh. 16 - Biologists have learned from the technique of...
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- a. What is the purpose of molecular cloning?b. What purpose do selectable markers serve in vectors?c. What is the purpose of the origin of replication in aplasmid vector?d. Why do cloning vectors have polylinkers?arrow_forwardARE THEY TRUE OR FALSE? a) In a caesium chloride density gradient centrifugation method performed in the presence of ethidium bromide, supercoiled plasmid DNA binds more ethidium bromide than linear DNA. B)Tth DNA polymerase shows DNA-dependent DNA polymerase activity as well as RNA-dependent DNA polymerase activity. C)Magnesium ions stimulate polymerase activity. Therefore, it is better to use the highest concentration of magnesium in PCR amplification. D)When lambda bacteriophage infects E. coli cell lysis never occurs, and the infected bacterium can continue to grow and divide. E)The copy number refers to the number of molecules of an individual plasmid that are normally found in a single bacterial cell. F)RNase H selectively hydrolyzes phosphodiester bonds of RNA molecules in RNA:DNA duplexes.arrow_forwardFind out whether the following are true or false. a)Klenow polymerase is E. coli DNA polymerase I which has no 5' → 3‘ exonuclease activity. b)The best way to increase the amount of the product in PCR amplification is to increase the cycle number. c)In a PCR, primers must be identical to their template strand in order for hybridization to occur. d)The accuracy of the amplification with Taq DNA polymerase is very high due to its high 3’→ 5’ exonuclease activityarrow_forward
- Which one of the following statements is true? a. Dideoxynucleotides signal the end of DNA replication in a cell b. None of the provided answers are true c. The DNA sequence determined by an autoradiogram should be identical to the template strand DNA sequence d. The probe hybridization solution used in the Sothern blot technique is approximately pH 10.0 e. The transfer buffer used in the Southern blot technique is approximately pH 7.0arrow_forwardIn the Avery, McCarty and McCleod experiment, DNA was identified as the heritable material because, A. R bacteria, when precipitated out of the test tube with an antibody, gave rise to bacterial colonies on a nutrient agar plate. B. R bacteria, when precipitated out of the test tube with DNase, gave rise to bacterial colonies on a nutrient agar plate. C. The transforming principle was susceptible to treatment with protease D. S bacteria were not precipitated out of the test tube by an anti-R bacteria antibody when S bacterial extracts were incubated with DNase E. S bacteria were not precipitated out of the test tube by an anti-R bacteria antibody when S bacterial extracts were incubated with proteasearrow_forwardIn Cohen-Boyer’s recombinant DNA procedure, ___i___ must be used for both the bacterial DNA and the amphibian DNA ___ii___ a) the same restriction enzyme; so that the restriction sites are identical in the DNA of each species b) different restriction enzymes; So that the genes outside the restriction site are maintained c) different restriction enzymes; to ensure that the newly introduced genes are maintained in the bacterial DNA d) the same restriction enzyme; to ensure that the newly formed DNA can replicatearrow_forward
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