BIOLOGY-TEXT
5th Edition
ISBN: 9781260169621
Author: BROOKER
Publisher: MCG
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Chapter 15, Problem 4TY
Summary Introduction
Introduction: Those factors which cause the mutations are known as mutagens. The mutagens can be derived from the environment such as UV lights or x-rays. The influence of high amount of mutagen on an organism can lead to the formation of thymine dimer, which is very harmful to the organism.
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In general, all mutations can be considered harmful, because most genetic systems are already optimized to work correctly and efficiently.
A. True
b. False; mutations are considered harmful only if they have a direct effect on the ability of cells to synthesize DNA
c. False; some mutations are harmful, and some are considered beneficial
Which of the following is NOT true about mutations?
A. Mutations can be harmful but not beneficial to the cell
B. Nucleotide substitution in DNA can cause nonsense mutations
C. Nucleotide substitution in DNA can cause missense mutations
D. Mutagens increase the rate of mutation, but mutations are still random
E. Nucleotide insertion or deletion in DNA can cause frameshift mutations
When using gene therapy to treat an hereditary disease, the idea is to:
A. Introduce the correct gene into the patient's DNA
B. Inject the patient with a specific protein to cure the disease.
C. Blood transfusions from healthy individuals.
D. ntroduce mRNA molecules with the correct genetic information to the patient.
E. Introduce a virus to the patient that will specifically destroy mutated cells.
Chapter 15 Solutions
BIOLOGY-TEXT
Ch. 15.1 - Consequences of Mutations Concept Check: Based on...Ch. 15.1 - Prob. 2CCCh. 15.2 - Prob. 1EQCh. 15.2 - Prob. 2EQCh. 15.2 - Prob. 3EQCh. 15.2 - Prob. 1CCCh. 15.3 - DNA Repair Concept Check: Which components of the...Ch. 15.3 - Why is this person so sensitive to sunlight?...Ch. 15.4 - Prob. 1CCCh. 15.4 - Prob. 2CS
Ch. 15.4 - Prob. 2CCCh. 15.4 - Prob. 3CCCh. 15.4 - Prob. 4CCCh. 15 - Prob. 1TYCh. 15 - Prob. 2TYCh. 15 - Prob. 3TYCh. 15 - Prob. 4TYCh. 15 - Prob. 5TYCh. 15 - The Ames test a. provides a way to determine if...Ch. 15 - Xeroderma pigmentosum a. is a genetic disorder...Ch. 15 - Prob. 8TYCh. 15 - Prob. 9TYCh. 15 - Prob. 10TYCh. 15 - Prob. 1CQCh. 15 - Prob. 2CQCh. 15 - Prob. 3CQCh. 15 - Prob. 1COQCh. 15 - Distinguish between spontaneous and induced...
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- Induced mutations A. are a random change in the DNA arising from errors in replications B. are a result of exposure to a mutagen C. always have a positive effect on the organism D. always have a negative effect on the organismarrow_forwardA SNV mutation that results in no change in the amino acid sequence is called: A. silent mutation B. silencing mutation C. missense mutation D. nonsense mutation E. frameshift mutationarrow_forwardWhich of the following is true about the enzyme telomerase? A. It is found only in adult cells. B. It is responsible for telomere shortening. C. It can re-establish telomere length. D. It may speed up the aging process. E. It is expressed at low levels in cancer cells.arrow_forward
- Which of the following is an example of a somatic mutation? a. A mutation in an embryonic muscle cell b. A mutation in a sperm cell c. A mutation in an adult nerve cell The somatic cells are all cells of the body excluding the d. Both a and c are examples of somatic mutations.arrow_forwardA genetic researcher notices that individuals with a particular genetic disease have a shortened version of key protein involved in the diseased biochemical pathway. Which of the following mutations is most likely to result in the premature termination of protein synthesis? A. The disease is caused by a silent mutation. B. The disease is caused by a frameshift mutation. C. The disease is caused by a missense mutation. D. The disease is caused by a nonsense mutation.arrow_forwardA mutation changes a codon that specifies tyrosine into a stopcodon. This type of mutation is aa. missense mutation.b. nonsense mutation.c. frameshift mutation.d. neutral mutation.arrow_forward
- Methylation can alter the process of gene expression because: B. By causing DNA to coil more tightly. A. By derailing the cellular transcription machinery. C. By removing the gene from the genome altogether. D. ALL answers A, B and C are correct. E. Only answers A and B are correct, but not C.arrow_forwardWhich of the following is true about DNA manipulation? Select the best answer. A. all of these B. DNA has never been transferred between different organisms. C. Transferring DNA from one organism into another always kills the host organism. D. Whole genomes have been manipulated by humans for centuries; now individual genes ca be inserted into different organisms using a variety of techniques. E. DNA can't be manipulated.arrow_forwardMutation rates are typically low due toa. proofreading by DNA polymerase.b. DNA repair enzymes.c. silent mutations.d. None of these are correct.e. All of these are correct.arrow_forward
- A.) There is no change in the DNA sequence if nucleotides are added or removed, it will have no effect to the cell. B.) Mutations in the DNA sequence are all irreversible. A. Statement A is correct B. Statement B is correct C. Both A and B are correct D. Both A and B are incorrectarrow_forwardThe effects of transposons can includeA. disruption of gene expression.B. prevention of gene expression.C. occurrence of inversions.D. occurrence of deletions.E. all of the abovearrow_forwardWhich of the following mutations is NOT a point mutation? A. Missense mutation B. Insertion mutation C. Nonsense mutation D. Silent mutationarrow_forward
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY