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 15SQ
Suppose a point mutation occurred in the third position of a codon in a DNA template Coding for a protein, changing it from TTT to TTC. What would be the consequences of this mutation?
- (a) It would cause a frameshift mutation downstream of the point mutation, resulting in a different protein.
- (b) It would cause a different amino acid to be placed at this position in the polypeptide, making it a mutant protein.
- (c) There would be no change in the amino acid at this position because, of the redundancy of the genetic code. Such point mutations are known as “silent mutations” because, although the genotype is different, the
phenotype remains the same. - (d) All of the above.
- (e) None of the above.
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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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