. Which type of DNA repair is defective in severe combined immunodeficiency disease (SCID)? Homologous end joining repair b. Nucleotide excision repair c. Non-homologous end joining repair d. Base excision repair a. с.
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- Nucleotide excision repair A. recognizes and repairs thymine dimers and other damaged bases in DNA B. corrects errors in nucleotide excision C. recognizes and removes mismatched bases after DNA synthesis is completed D. removes nucleotides that are incorrectly incorporated during DNA synthesisWhat can cause mutations in the DNA sequence? Select all that apply. A. Failure of repair enzymes to recognize mismatched nucleotides before and during DNA replication B. Recognition of mismatched bases by repair enzymes before and during DNA replication C. Exposure of cells to ionizing radiation D. Nucleotide errors occurring during DNA replicationWhat can cause mutations in the DNA sequence? Select all that apply. a.Exposure of cells to ionizing radiation b.Failure of repair enzymes to recognize mismatched nucleotides before and during DNA replication c.Recognition of mismatched bases by repair enzymes before and during DNA replication d.Nucleotide errors occurring during DNA replication
- Which of the following is not a DNA repair mechanism? a) binding-protein excision repair b) nucleotide excision repair c) mismatch repair d) base excision repairDNA Repair Systems a. counteract spontaneous and induced mutations b. counteract induced mutations only c. counteract amino acid changes introduced by mutations d. prevent DNA damageIn nucleotide excision repair in E. coli, the function of the UvrA/UvrB complex is toa. detect DNA damage.b. make cuts on both sides of the damage.c. remove the damaged piece of DNA.d. replace the damaged DNA with undamaged DNA.
- 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 correctDefects in the excision repair process may result in : A. Mutations B. Okazaki fragments C. Excess DNA polymerase activity D. Shortened telomeresPatients, who have a defect in one of the DNA repair systems may have what? Check All That Apply A. Decreased incidence of thymine dimers B. Increased number of skin lesions, such as freckles C. Increased chance of cancer D. Fewer mutations in their DNA Pls help ASAP with this questions and pls explain!!
- 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.A cytosine is deaminated, forming uracil. Which DNA repair systems is best able to correct this error?a) CPD photolyase repairb) mismatch repair c) nucleotide-excision repair d) base-excision repaire) homology-directed repairWhat repair system will have an issue functioning properly if DNA glycosylase loses its function? A. Photoreactivation repair B. Base excision repair C. Nucleotide excision repair D. SOS repair
