chapter 10
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In Inglés
In Inglés
Practique preguntas conocidas
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chapter 10 - Marcador
chapter 10 - Detalles
Niveles:
Preguntas:
78 preguntas
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Ionizing radiation does NOT include A) gamma rays. B) UV rays. C) X-rays. D) cosmic rays. | B) UV rays. |
Which of the following methods may introduce foreign DNA into a recipient? A) transformation B) transduction C) conjugation D) transformation, transduction, and conjugation | D) transformation, transduction, and conjugation |
A plasmid may A) replicate independently of the chromosome. B) be transferred cell-to-cell during conjugation. C) be integrated into the chromosome. D) replicate independently of the chromosome, integrate into the chromosome, or be transferred cell-to-cell during conjugation. | D) replicate independently of the chromosome, integrate into the chromosome, or be transferred cell-to-cell during conjugation. |
Plasmids that govern their own transfer are known as A) transformable. B) transmutable. C) conjugative. D) transfective. | C) conjugative. |
Homologous recombination has been observed in A) Archaea. B) Bacteria. C) Eukarya. D) Archaea, Bacteria, and Eukarya. | D) Archaea, Bacteria, and Eukarya. |
Transposition is a(n) A) homologous recombination event. B) analogous recombination event. C) site-specific recombination event. D) general recombination event. | C) site-specific recombination event. |
The enzyme transposase may be coded for by insertion sequences on a A) chromosome. B) phage. C) plasmid. D) chromosome, phage, or plasmid. | D) chromosome, phage, or plasmid. |
A "point mutation" refers to mutations involving A) a base-pair substitution. B) the gain of a base pair (microinsertion). C) the deletion of a base pair (microdeletion). D) a substitution, deletion, or addition of one base-pair. | D) a substitution, deletion, or addition of one base-pair. |
Which of the following is most similar to lysogeny? A) Hfr state B) F+ state C) F- state D) F' state | A) Hfr state |
Which of the following factors has delayed the development of laboratory-based genetic systems in Archaea? A) There are no documented systems of conjugation in Archaea. B) Homologous recombination does NOT occur in Archaea. C) Archaea do NOT host viruses or plasmids. D) Many archaea grow in extreme or unusual conditions that make the use of agar and traditional mutant screening techniques problematic. | D) Many archaea grow in extreme or unusual conditions that make the use of agar and traditional mutant screening techniques problematic. |
Transformation and homologous recombination allow for the formation of heteroduplex DNA. Which of the following would occur during DNA replication of this molecule? A) One daughter strand is complementary to the recombinant DNA molecule, while the other daughter strand is complementary to the parent DNA molecule. B) Both daughter strands are complementary to the recombinant DNA molecule. C) Both daughter strands are complementary to the parent DNA molecule. D) None of the answers are correct. | A) One daughter strand is complementary to the recombinant DNA molecule, while the other daughter strand is complementary to the parent DNA molecule. |
) The SOS system repairs DNA that has gaps, breaks, and other lesions by A) cutting DNA from other parts of the genome and pasting it into the gaps or damaged areas. B) stabilizing single-stranded DNA until the next round of normal replication. C) using specialized DNA polymerases that will synthesize a new DNA strand even if there is not a normal complementary DNA strand to act as a template. D) using available mRNA and a special RNA-dependent DNA polymerase to fill in the gaps and replace damaged DNA. | C) using specialized DNA polymerases that will synthesize a new DNA strand even if there is not a normal complementary DNA strand to act as a template. |
When DNA is transferred into a prokaryotic cell it may A) be degraded by enzymes. B) replicate independent of the host chromosome. C) recombine with the host chromosome. D) be degraded by enzymes, replicate independent of the host chromosome, or recombine with the host chromosome. | D) be degraded by enzymes, replicate independent of the host chromosome, or recombine with the host chromosome. |
High-efficiency natural transformation A) is common in Bacteria and Archaea. B) requires specialized DNA uptake, DNA binding, and integration proteins. C) is only common in Archaea. D) usually involves plasmids. | B) requires specialized DNA uptake, DNA binding, and integration proteins. |
The CRISPR system A) facilitates homologous recombination through a complex system of proteins and clustered repeats. B) recognizes foreign DNA sequences that have previously entered the cell and directs the Cas proteins to destroy them. C) repairs DNA and increases DNA damage tolerance during times of stress. D) synthesizes gene transfer agents during stationary phase. | B) recognizes foreign DNA sequences that have previously entered the cell and directs the Cas proteins to destroy them. |