The process in which completely unmethylated DNA becomes methylated is called a. maintenance methylation. b. de novo methylation. c. primary methylation. d. demethylation.
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The process in which completely unmethylated DNA becomes methylated is called
a. maintenance methylation.
b. de novo methylation.
c. primary methylation.
d. demethylation.
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- The action of ultraviolet radiation on DNA to induce mutation is the Select one: a. methylation of base pairs b. deletion of base pairs c. formation of thymine dimers d. addition of base pairsWhat specifically will happen if DNA polymerase is inaccurate during DNA synthesis? Explain how this inaccuracy might affect the organism.You are an expert in DNA-repair mechanisms. You receive a sample of a human cell line derived from a woman who has symptoms of xeroderma pigmentosum. You determine that she has a mutation in a gene that has not been previously associated with XP. How is this possible?
- Which of the following is true of reverse transcriptase?a. It is required for the movement of DNA transposons.b. It catalyzes the synthesis of DNA from RNA.c. It is required for the transposition of retrotransposons.d. b and c are correct.Base analogs are mutagenic because of which characteristic? a. They produce changes in DNA polymerase that cause it to malfunction. b. They distort the structure of DNA. c. They are similar in structure to the normal bases. d. They chemically modify the normal bases.Which of the following statements describe reversal of DNA repair mechanism. A. UV light blocks the translation of mRNA beyond the damaged area B. Reversal of DNA repair mechanism requires a DNA template C. UV light is needed to initiate the formation of pyrimidine dimers D. None of the statement is correct
- Xeroderma pigmentosum is a genetic disease caused by an error in the nucleotide excision repair process that fixes damage to DNA by ultraviolet light. Studies have shown that it can result from mutations in any one of seven genes. What can you infer from this finding? A) There are seven genes that produce the same protein B) These seven genes are the most easily damaged by ultraviolet light. C) There are seven enzymes involved in the nucleotide excision repair process. D) These mutations have resulted from translocation of gene segments.Addition or deletion of bases causes which kind of mutation? Select one: a. Frameshift mutation b. Transversion c. Transition d. TranscriptionBriefly answer the question: Exome sequencing to identify a mutation that could cause a particular set of symptoms in a patient can reveal another genetic condition that has not yet been detected. Under what circumstances, if any, do you think patients should receive such "secondary findings"?
- Following a CRISPR mediated DNA double-strand break, how can the DNA be repaired by the cell? Choose all that apply. A. Base pairing between complementary sticky sides. B. Nonhomologous end joining. C. Homology directed repair. D. Crossing over between nonhomologous chromosomes.Polymerase Chain Reaction, or PCR, can Group of answer choices A. target a specific region of DNA and cut it out of the rest of the genetic material for further analysis. B. copy the number of copies of a selected region of DNA linearly. C. increase the number of copies of a selected region of DNA exponentially. D. copy the entire genome at least a dozen times.Which statement regarding transitions and transversions is TRUE? a) An adenine to guanine change is a transversion b) Transversions are more commonly found in nature that are transitions c) A cytosine to guanine change is a transition d) Transversions cause a distortion in the DNA double helix