Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 1A
Nucleoside analogs and ionizing radiation are used in treating cancer. These mutagens can cause cancer, so why do you suppose they are used to treat the disease?
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Researchers sometimes use gamma rays to induce deletion mutations in certain organisms and thus create mutant strains. What might this suggest regarding how exactly gamma rays interact with DNA? What are they probably causing to happen that results in these deletion mutations?
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A- gamma rays
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Chapter 8 Solutions
Microbiology: An Introduction
Ch. 8 - Briefly describe the components of DNA, and...Ch. 8 - DRAW IT Identify and mark each of the following on...Ch. 8 - Match the following examples of mutagens. Column A...Ch. 8 - The following is a code for a strand of DNA. a....Ch. 8 - Identify when (before transcription, after...Ch. 8 - Which sequence is the best target for damage by UV...Ch. 8 - You are provided with cultures with the following...Ch. 8 - Why are mutation and recombination important in...Ch. 8 - NAME IT Normally a commensal in the human...Ch. 8 - Match the following terms to the definitions in...
Ch. 8 - Match the following terms to the definitions in...Ch. 8 - Feedback inhibition differs from repression...Ch. 8 - Bacteria can acquire antibiotic resistance by all...Ch. 8 - Suppose you inoculate three flasks of minimal...Ch. 8 - Plasmids differ from transposons in that plasmids...Ch. 8 - Mechanism by which the presence of glucose...Ch. 8 - The mechanism by which lactose controls the lac...Ch. 8 - Two offspring cells are most likely to inherit...Ch. 8 - Which of the following is not a method of...Ch. 8 - Nucleoside analogs and ionizing radiation are used...Ch. 8 - Replication of the E. coli chromosome takes 40 to...Ch. 8 - Pseudomonas has a plasmid containing the mer...Ch. 8 - Ciprofloxacin, erythromycin, and acyclovir are...Ch. 8 - HIV, the virus that causes AIDS, was isolated from...Ch. 8 - Human herpesvirus-8 (HHV-8) is common in parts of...
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- Although it is well known that X-rays cause mutations, they are routinely used to diagnose medical problems, including potential tumors, broken bones, and dental cavities. Why is this done? What precautions need to be taken?arrow_forwardOur bodies are not defenseless against mutagens that alter our genomic DNA sequences. What mechanisms are used to repair DNA?arrow_forwardWhat percentage of the DNA in the genome actually corresponds to genes? How much is actually protein-coding exons? What makes up the rest?arrow_forward
- How does a mutagen induce mutation ?explain with examples?arrow_forwardWhat will happen in a cell if the DNA ligase gene is mutatedarrow_forwardthe human immunodeficiency virus HIV uses RNA rather than DNA to encode genetic information. During infection, however, HIV uses an enzyme known as reverse transcriptase to generate double-stranded DNA. Generally speaking, how would the enzyme generate a double strand of DNA from a single strand of RNA?arrow_forward
- Is it possible for their to be a mutation where an individual has incomplete or missing sets of chromosomes? or Would that simply result in the loss of life? I would say an easier way to describe a genome is by calling it either a blueprint of DNA or referring it as one full set of genetic information.arrow_forwardSome mutations affect changes in protein structure and function that can result in disease whereas other mutations have no significant effects on protein structure and function. Please explain reasons for the above mentioned statement. Human civilization has resulted in a large number of potentially mutagenic chemicals (e.g. pesticides) and has changed the environment to increase the likelihood of encountering other mutagens, especially UV radiation. What roles should the authorities play in identifying mutagens and regulating their release into the environment?arrow_forwardIn the DNA of what kind of cell must a mutation occur for the genetic change to be passed down to future generations?arrow_forward
- Why is it important for DNA to be copied before a cell undergoes mitosis?arrow_forwardWhat kind of things are able to cause genetic mutations?arrow_forwardWhich type of mutation in telomerase is associated with cancer cells? a. Mutations that produce an inactive form of telomerase b. Mutations that decrease the expression of telomerase c. Mutations that increase the expression of telomerase d. All of the abovearrow_forward
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