GENETICS(LL)-W/CONNECT >CUSTOM<
6th Edition
ISBN: 9781260571561
Author: HARTWELL
Publisher: MCG CUSTOM
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Chapter 6, Problem 11P
A particular virus with DNA as its genetic material has the following proportions of
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Heinz Shuster collected the following data on the base composition of ribgrass mosaic virus (H. Shuster, in The Nucleic Acids: Chemistry and Biology, vol. 3, E. Chargaff and J. N. Davidson, Eds. New York: Academic Press, 1955). On the basis of this information, is the hereditary information of the ribgrass mosaic virus RNA or DNA? Is it likely to be single stranded or double stranded? Percentage A G C T U Ribgrass mosaic virus 29.3 25.8 18.0 0.0 27.0
A virus has a double-stranded RNA genome that has 2400 base-pairs. Of these, 35 % are G:C base-pairs. How many uracil nucleotides would be present in this virus?
RNA was extracted from certain virus and found to contain 35% cytosine. With this information, is it possible to predict what percentage of the bases in virus are adenine? If so, what percentage? If not, why not?
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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- Heinz Shuster collected the following data on the base composition of ribgrass mosaic virus (H. Shuster, in The Nucleic Acids: Chemistry andBiology, vol. 3, E. Chargaff and J. N. Davidson, Eds. New York: Academic Press, 1955). On the basis of this information, is the hereditary information of the ribgrass mosaic virus RNA or DNA? Is it likely to be single stranded or double stranded?arrow_forwardFor double-stranded DNA, which of the following statements is true? a) A = C b) A = G and C = T c) A + C = G + T d) A + T = G + C e) B and C are truearrow_forwardA virus has a double-stranded RNA genome that has 2400 base-pairs. Of these, 35 % are G:C base-pairs. How many uracil nucleotides would be present in this virus? Show all your calculations.arrow_forward
- DNA from a newly discovered virus was purified, and UV light absorption was followed as the molecule was slowly heated. The absorbance increase at the melting temperature was only 10%. What does this result tell you about the structure of the viral DNA?arrow_forwardMolnupiravir causes widespread mutations as SARS-CoV-2 replicates its genome because in an RNA double helix molnupiravir can base pair with more than one base. Shown below are the structures the RNA bases. With which two bases does molnupiravir pair? H N-H Adenine NH-N Uracil H H-N N-HN N-H Guanine H Cytosine A. The "imino" form pairs with A; the "amino" form pairs with G. B. The "imino" form pairs with G; the "amino" form pairs with A. C. The "imino" form pairs with U; the "amino" form pairs with C. D. The "imino" form pairs with C, the "amino" form pairs with U.arrow_forwardA virus has a double-stranded DNA genome that has 4600 base-pairs. Of these, 54 % are A:T base-pairs. How many cytosine nucleotides would be present in this virus? Show all your calculations.arrow_forward
- A virus has a double-stranded RNA genome that has 1800 base-pairs. Of these, 20 % are cytosine. How many uracil nucleotides would be present in this virus? Show all your calculations.arrow_forwardYou have created a synthetic nucleotide, nucleotide X, which can be substituted into a DNA strand and is able to pair with C nucleotides. However, a C-X pairing is joined by a single hydrogen bond. If you were to create a DNA strand made with A, C, T and your new nucleotide X instead of G the new strand would... a) Denature at higher temperatures than a strand made with A, C, G, and T b) Expect helicase would have more difficulty separating these strands than strands made with A, C, G and T c) Denature at lower temperatures than a strand made with A, C, G, and T d) Not expect to see any differences in the physical properties of this DNA compared to DNA made with A, C, G and Tarrow_forwardWhich of the following base-pairing rule is correct : * Adenine with guanine and thymine with cytosine DNA base pairing is non-specific Adenine with cytosine and guanine with thymine Adenine with thymine and guanine with cytosinearrow_forward
- Which of the following statements regarding polynucleotides is true? a) A double stranded DNA forms a right-handed helix, where both strands run anti-parallel to each other. b) A double stranded DNA forms a left-handed helix, where both strands run anti-parallel to each other. c) A double stranded DNA forms a left-handed helix, where both strands run parallel to each other. d) A double stranded DNA forms a right-handed helix, where both strands run parallel to each other.arrow_forwardIn an attempt to understand whether viruses rely on proteins or nucleic acids to transmit their genetic information into their host cells, scientists were able to track the movement of phosphorus and nitrogen from the virus to its host cell. Which of the following describes the most likely conclusion from this observation? A B с D The molecule that is transmitted by the virus is a protein since proteins contain nitrogen but nucleic acids do not. The molecule that is transmitted by the virus is a protein since proteins contain phos- phorus but nucleic acids do not. The molecule that is transmitted by the virus is a nucleic acid since nucleic acids contain phosphorus but proteins do not. The molecule that is transmitted by the virus is a nucleic acid since nucleic acids contain nitrogen but proteins do not.arrow_forwardA scientist isolates the DNA genome from a virus. She attempts to carry out a melting analysis but finds only 10% hypochromicity. (a) Suggest an explanation for the low value. (b) Why do you think she finds this much?arrow_forward
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