Microbiology: Principles and Explorations
9th Edition
ISBN: 9781118743164
Author: Jacquelyn G. Black, Laura J. Black
Publisher: WILEY
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Textbook Question
Chapter 7, Problem 4.3SC
Why are nitrates and nitrites, which have been added to sausages to retard bacterial growth and thereby prevent food poisoning, a dnager to humans?
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Chapter 7 Solutions
Microbiology: Principles and Explorations
Ch. 7 - Compare and contrast chromosomes in prokaryotes...Ch. 7 - DNA is not always the gemetic material. What are...Ch. 7 - How could mutations give rise to new alleles of a...Ch. 7 - How does trandlation differ from transcription?Ch. 7 - Distinguish between leading and lagging strands.Ch. 7 - What do 5 and 3 refer to? How do they determine...Ch. 7 - Contrast the three kinds of RNA. Does DNA make all...Ch. 7 - What feeds back in feedback inhibition? What does...Ch. 7 - What is the inducer for the lac operon?Ch. 7 - Compare enzyme induction and enzyme repression.
Ch. 7 - If you had be exposed to a mutagen,would you...Ch. 7 - How can a change in geneotype fail to produce a...Ch. 7 - Why are nitrates and nitrites, which have been...Ch. 7 - Cathy develops a painful cluster of blister-like...Ch. 7 - Prokaryotes usually have just one chromosome and...Ch. 7 - During the early stages of development of the...Ch. 7 - Suppose you are a medical technician working in a...Ch. 7 - Match the following terms with their descriptions:Ch. 7 - Prob. 2SQCh. 7 - Prob. 3SQCh. 7 - Match the following terms with their respective...Ch. 7 - From the DNA template sequence 3-ATGCAGTAG-5, what...Ch. 7 - What type of RNA carries and transfers amino acids...Ch. 7 - What type of RNA carries the genetic information...Ch. 7 - Which of the following statements does not...Ch. 7 - Prob. 9SQCh. 7 - For the lac operon, match the following:Ch. 7 - Prob. 11SQCh. 7 - A frameshift mutation occurs following the: (a)...Ch. 7 - Prob. 13SQCh. 7 - Which of the following schemes for molecular...Ch. 7 - Suppose a point mutation occurred in the third...Ch. 7 - Prob. 16SQCh. 7 - (a) Why are bacteria useful in the study of...Ch. 7 - DNA damage in the form of dimers induced by UV...Ch. 7 - Prob. 19SQCh. 7 - Name and describe the effects of the following...
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- Chlorambucil is a nitrogen mustard. What is the structure of its covalent adduct to DNA?arrow_forwardChemical analysis shows that a nucleic acid sample contains A, U, C, and G. Is this DNA or RNA? Why?arrow_forwardUse the figure of a plasmid below to answer the following questions. 43) Which enzyme was used to produce the molecule in the figure above? A) RNA polymerase C) a restriction enzyme (endonuclease) B) ligase D) DNA polymerasearrow_forward
- In DNA extraction where ethanol was used why does the DNa floatarrow_forwardIn standard agarose gels used for the analysis of DNA, linear DNA fragments are separated on the basis of their... a) Size b) Charge c) Buoyancy d) Color e) Smellarrow_forwardPCR can be used __________. a) to increase the number of specific DNA fragments b) to modify the genome c) to obtain the sequence of the DNAarrow_forward
- You are trying to determine the base content for a number of samples in the lab (mouse DNA, bacterial DNA, single-stranded DNA virus and double-stranded RNA virus). Unfortunately, you failed to use an alcohol-proof marker and during the ethanol precipitation of your samples the labels came off the tubes. You finish the experiment anyway and try to use the data to determine the samples. Can you determine the source of each sample based on your results? Briefly explain how you come to your designations. Sample % adenine % cytosine % guanine % thymine % uracil A 18 32 32 18 0 B 26 18 32 24 0 C 31 19 19 0 31 D 10 40 40 10 0arrow_forwardWhich helps prevent errors in DNA replication? A) Complementary base pairing reduce errors B) DNA ligase checks the DNA for errors C) DNA is located in the ribosomes D) Any base can pair with any other basearrow_forwardA scientist inserts a radioactively labeled DNA molecule into a bacterium. The bacterium replicates this DNA molecule and distributes one daughter molecule (double helix) to each of two daughter cells. How much radioactivity will the DNA in each of the two daughter cells contain? Why?arrow_forward
- Primer needed to initiate DNA replication is A) DNA segment B) RNA segment C) DNA-RNA hybrid D) Nucleotidearrow_forwardDefine nucleic acid. What are the best sample sources that can be used in the extraction of nucleic acids? Give examples (2) of nucleic acids. Differentiate RNA from DNA in terms of their chemical properties.arrow_forwardIn DNA replication, the enzyme helicase breaks hydrogen bonds between complementary nucleotides and causes the double-stranded DNA to become single-stranded (denatures the DNA). What is used in PCR to break the hydrogen bonds between complementary nucleotides? A) buffers B) DNases C) taq Polymerase D) heat E) helicasearrow_forward
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