22. Which of the following events is most likely to give rise to gene families? a....
22. Which of the following events is most likely to give rise to gene families? a. intragenic mutation b. DNA segment shuffling c. gene duplication d. horizontal transfer of DNA e. none of the above
Homework Answers
Gene duplication is most likely to give rise to gene families as it causes variation which then form multigene families with high degree of divergence.
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22. Which of the following events is most likely to give rise to
gene families? a....
A cell that is heterozygous for a nonsense mutation in a tumor suppressor gene would most...
A cell that is heterozygous for a nonsense mutation in a tumor suppressor gene would most likely: A) Group of answer choices B) grow but not divide C) have a normal cell cycle D) arrest and induce apoptosis E) have a slightly increased cell cycle and increased cell growth F) grow and divide uncontrollably Which of the following correctly describes an event that occurs during transcription: Group of answer choices A) A DNA molecule is chemically modified to become a...
Which of the following defects is most likely to be found in yeast cells with a...
Which of the following defects is most likely to be found in yeast cells with a dramatically increased rate of genomic mutation per cell cycle ? Activation of a G1/S DNA damage checkpoint in the absence of DNA damage. Activation of a G1 restriction point checkpoint despite adequate cell size and nutrient supply. A silent mutation within a DNA replication polymerase. A mutation that inactivates a gene encoding an essential component of a DNA damage checkpoint. Activation of a G2/M...
1. Which of the following mutations is the most likely to be neutral? A) A nonsense...
1. Which of the following mutations is the most likely to be neutral? A) A nonsense mutation in exon 5 of a gene with 39 exons. B) A splice site mutation in intron 3 of a gene with 8 introns and 9 exons. C) A single nucleotide insertion in exon 7 of a gene with 18 exons. D) A thee nucleotide deletion in exon 1 of a gene with 7 exons.
Which of the following mutations is most likely to result in a non-functional protein? a) a...
Which of the following mutations is most likely to result in a non-functional protein? a) a single-nucleotide substitution in a promoter b) an insertion in an intron c) a frameshift mutation d) a missense mutation You have conducted an Ames test on a given compound to determine whether it is a mutagen. Which of the following would be classified as a positive result on the Ames test? a) originally His+ strain grows on minimal medium with histidine. b) originally His+...
22. (2 pts) The following step(s) occur in replication of both Bdellovibrio and a lytic virus...
22. (2 pts) The following step(s) occur in replication of both Bdellovibrio and a lytic virus such as T4, pathogens of E. coli. A. The genetic material of the pathogen is injected into the host cell B. The pathogen carbohydrates in the host to replicate itself. uses C. The host cell lyses, releasing the replicated pathogen D. The host cell DNA polymerase replicates the pathogen genome. 23. (2 pts) Phage are composed of nucleic acid and protein. Which of the...
Which of the following would be most likely found within an operon with other genes? a....
Which of the following would be most likely found within an operon with other genes? a. A gene for antibiotic resistance b. A gene encoding a ribosome c. A gene responsible for synthesizing a metabolic intermediate d. A gene encoding a DNA polymerase
33. Which of the following conditions are necessary for a gene to be expressed? A. condensed...
33. Which of the following conditions are necessary for a gene to be expressed? A. condensed chromatin with DNA tightly coiled around nucleosomes B. open chromatin making the gene available for transcription C. specific signals from the environment D. active retrotransposons E. Both A and C are true F. Both B and C are true G. all of the above 34. Which of the following histone modifications results in more open chromatin? A. methylation B. acetylation C. restriction enzyme digest...
Which mutation is most likely to have a severe impact on the phenotype of an organism...
Which mutation is most likely to have a severe impact on the phenotype of an organism if it occurs within the first several bases of a gene coding region? A) a frameshift mutation of three nucleotides B) a missense mutation affecting one nucleotide C) a missense mutation affecting three nucleotides D) a silent mutation affecting one nucleotide E) a frameshift mutation of one nucleotide
Which of the following is a way that protein function can be modified AFTER translation? Select...
Which of the following is a way that protein function can be modified AFTER translation? Select one: a. gene duplication b. gene rearrangement c. protein cleavage d. exon shuffling e. transcription regulation
of chromosomes to avoid loss of gene 16. Which of the following enzymes adds DNA to...
of chromosomes to avoid loss of gene 16. Which of the following enzymes adds DNA to the ends of chromos material with duplication? a. Telomerase b. Polymerase c. Helicase d. Primase e. Ligase " Which of the following structures indicates where DNA replication ructures indicates where DNA replication begins?
1. Which of the following mutations is the most likely to be neutral? A) A nonsense mutation in exon 5 of a gene with 39 exons. B) A splice site mutation in intron 3 of a gene with 8 introns and 9 exons. C) A single nucleotide insertion in exon 7 of a gene with 18 exons. D) A thee nucleotide deletion in exon 1 of a gene with 7 exons.
22. (2 pts) The following step(s) occur in replication of both Bdellovibrio and a lytic virus such as T4, pathogens of E. coli. A. The genetic material of the pathogen is injected into the host cell B. The pathogen carbohydrates in the host to replicate itself. uses C. The host cell lyses, releasing the replicated pathogen D. The host cell DNA polymerase replicates the pathogen genome. 23. (2 pts) Phage are composed of nucleic acid and protein. Which of the...
33. Which of the following conditions are necessary for a gene to be expressed? A. condensed chromatin with DNA tightly coiled around nucleosomes B. open chromatin making the gene available for transcription C. specific signals from the environment D. active retrotransposons E. Both A and C are true F. Both B and C are true G. all of the above 34. Which of the following histone modifications results in more open chromatin? A. methylation B. acetylation C. restriction enzyme digest...
of chromosomes to avoid loss of gene 16. Which of the following enzymes adds DNA to the ends of chromos material with duplication? a. Telomerase b. Polymerase c. Helicase d. Primase e. Ligase " Which of the following structures indicates where DNA replication ructures indicates where DNA replication begins?
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