Microbiology: Principles and Explorations
9th Edition
ISBN: 9781118743164
Author: Jacquelyn G. Black, Laura J. Black
Publisher: WILEY
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Chapter 7, Problem 13SQ
Summary Introduction
Introduction: A mutation can be defined as a stable modification in DNA. Mutations can be caused by ultraviolet (UV) radiation from the sunlight and chemicals that are carcinogenic. UV radiation is non-ionizing radiation.
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Thymine diners
A) causes a covalent bond or occur between the complimentary nucleotides
B) are an example of the environment causing mutations to our genes
C) can never be repaired
D) are only found between adjacent adenines
It is a pyrimidine derivative that does not form
part of nucleic acids.... A) Thymine B) Cytosine
C) Adenine
. Which of the following statements best summarizes the differences between DNA and RNA?
A) DNA is transcribed using RNA polymerase to form mRNA and mRNA is translated by the Ribosome to form a polypeptide,
B) The bases in DNA contain sugars, whereas the bases in RNA do not contain sugar.
C) DNA nucleotides contain a different glucose compared to RNA nucleotides.
D) DNA is formed using the base uracil, whereas RNA uses the base thymine.
E) DNA encodes the sequence of amino acids for the primary structure of a polypeptide whereas mRNA does not
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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- 9) Which statement is inaccurate (wrong) about mRNA? A) it is double stranded and has thymine B) it can leave the nucleus C) It is single stranded and has uracil D) It is shorter than DNA 10) Which statemment accurately describes DDNA?arrow_forwardDehydration synthesis always results in the formation of which of the following? A.)Water B.)Amino acids C.)Proteins D.)Peptidesarrow_forwardRNA differs from DNA in that: a) The ribose in RNA nucleotides contains fewer oxygen atoms than does deoxyribose DNA nucleotides. b) It is always single stranded and cannot form base pairs. c) It contains the nucleotide uracil, which pairs with thymine. d) It is single-stranded but can fold into a variety of structures, some of which are double-stranded. e) RNA can only be found in the cytoplasm whereas DNA can only be found in the nucleus.arrow_forward
- Which of the following statements is (are) true? (a) Bacterial ribosomes consist of 40S and 60S subunits. (b) Prokaryotic DNA is normally complexed with histones. (c) Prokaryotic DNA normally exists as a closed circle. (d) Circular DNA is supercoiled.arrow_forwardTissues that are unable to produce nucleotides de novo depend on ____________________ to maintain an adequate supply of adenine nucleotides. (A) the redox reactions carried out by ribonucleotide reductase (B) the action of PRPP amidotransferase(C) uptake of ATP through dietary intake(D) salvaging hypoxanthine using HGPRT (E) the action of xanthine oxidasearrow_forward(61) A 61-year old woman comes to the physician because of scarring acne vulgaris that has not been responsive to topical medication. Oral tetracycline is prescribed . Which of the following best explains the mechanism of action of this drug? (A) Blockage of DNA gyrase (B) Destruction of active transport membrane transport (C) Inhibition of aminoacyl-RNA binding to bacterial ribosomes (D) Interference with the action of peptidyl transferase (E) Interferance with translocation reactionarrow_forward
- The sequence of nucleotides found in mRNA is determined by the a) structure of DNA polymerase, b) sequence of amino acids in a protein, c) large complex proteins, d) sequence of nucleotides in a gene, e) fatty acids and glycerol in the cell.arrow_forward( do d )arrow_forwardWhich of the following sequences could NOT be used as an anticodon in a cell?Question 41 options: A) 3'-CCU-5' B) 3'-AAU-5' C) 3'-GGI-5' D) 3'-GCI-5' E) 3'-UGG-5'arrow_forward
- Compare the process of Replication, Transcription, and Translation by describing the following properties for each: (circle, highlight, bold or whatever mechanism you want to use to indicate your answer)arrow_forwardAnswer the following questions: 1. Which of the following enzymes can polymerize deoxyribonucleotides into DNA? A) Primase B) DNA Ligase C) DNA Gyrase D) RNA Polymerase III E) Reverse Transcriptase 2. Which of the following has only one equivalent codon? A) Ala B) Arg C) Val D) Trp E) Gly 3. Which of the following does not describe transcription? A) Synthesis of RNA using DNA as the template B) Requires DNA-dependent RNA Pol C) Highly selective process that is strictly regulated D) A step in gene expression E) None of the above 4. Peptide bond formation happens in _____ site. A) A B) P C) E D) L E) Barrow_forward22. Polymerization of nucleotides results in: a) polypeptides b) polynucleotides c) polysaccharides d) polylipidsarrow_forward
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