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

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

Name: Which of the following is NOT true about mutations? A. Mutations can b
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Description: 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 mutationsC. Nucleotide substitution in DNA can cause missense mutationsD. Mutagens inc

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter9: Molecular Biology

Section: Chapter Questions

Problem 6RQ: A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA...

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Mutagens can cause mutations bya. chemically altering DNA nucleotides.b. disrupting DNA replication.c. altering the genetic code of an organism.d. all of the above.e. a and b only.
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
Are mutations harmful?a. Yes, because the DNA is damaged.b. No, because changes in the DNA result in better alleles.c. Yes, because mutated proteins don’t function.d. It depends on how the mutation affects the protein’s function.
What might best explain why the incidence of cancer increases as people age? Select one: a. mutations accumulate as people age b. cell division increases as people age c. protein synthesis increases as people age d. telomerase activity increases as people age e. ATP production increases as people age
_____ is a change in the order of one nucleotide in a section of a DNA molecule. a Point mutation b Spontaneous mutation c Somatic mutation d Germ mutation
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 organism
Which of the following types of mutations will have the most devastating effect on a cell?A.frameshift mutationB. missense mutationC. nonsense mutationD. silent mutation
The word mutation is generally considered to be negative. However, is there a positive side to mutations? Briefly explain your answer.
Which of the following statements best describes the outcome of a mutation? a. A mutation always results in a mutant genotype b. A mutation always results in a mutant karyotype c. A mutation always results in a mutant phenotype d. A mutation always results in a mutant protein
The Ames testa. provides a way to determine if any type of cell has experienced amutation.b. provides a way to determine if an agent is a mutagen.c. allows researchers to experimentally disrupt gene activity by causinga mutation in a specific gene.d. provides a way to repair mutations in bacterial cells.e. does all of the above.
A large portion of the human genome is transposons. Collectively, they are most likely: A) an equal mix of DNA and retrotransposons B) mostly DNA transposons because they are found in DNA C) mostly retrotransposons because they copy themselves each time they move D) mostly DNA transposons because they can cut themselves out
mutation are random change to the structure of gene. the likelihood of a mutation occuring can increase if a cell is . when mutations in a gene alter the sequence of amino acids, can be altered