03:17DNA Repair Mechanisms Base Excision Repair - AnimationDr.G Bhanu Prakash Animated Medical Videos1368views
Multiple ChoiceResearchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these mutations?3237views27rank1comments
Multiple ChoiceWhich of the following statements is/are correct with regard to individuals with the disorder xeroderma pigmentosum? 965views
Multiple ChoiceThe incorporation of an incorrect base into the DNA during replication __________. 1130views
Multiple ChoiceAs a result of proofreading by DNA polymerases, the overall error rate in the completed DNA molecule is approximately __________. 986views1rank
Multiple ChoiceIn a comparison between asexually reproducing bacteria and sexually reproducing multicellular eukaryotes, uncorrected errors in replication are more likely to be transmitted to subsequent generations in bacteria than in multicellular eukaryotes. Which of the following provides the best evidence-based explanation for this difference? 843views
Textbook QuestionWhat aspect of DNA structure makes it possible for the proteins of nucleotide excision repair to recognize many different types of DNA damage? (d) the regularity of DNA's structure798views
Textbook QuestionWhat aspect of DNA structure makes it possible for the proteins of nucleotide excision repair to recognize many different types of DNA damage? (c) the energy differences between correct and incorrect base pairs742views
Textbook QuestionWhat aspect of DNA structure makes it possible for the proteins of nucleotide excision repair to recognize many different types of DNA damage? (b) the antiparallel orientation of strands in the double helix827views
Textbook QuestionWhat aspect of DNA structure makes it possible for the proteins of nucleotide excision repair to recognize many different types of DNA damage? (a) the polarity of each DNA strand857views
Textbook QuestionThe spontaneous loss of amino groups from adenine in DNA results in hypoxanthine, an uncommon base, opposite thymine. What combination of proteins could repair such damage? a. nuclease, DNA polymerase, DNA ligase b. telomerase, primase, DNA polymerase c. telomerase, helicase, single-strand binding protein d. DNA ligase, replication fork proteins, adenylyl cyclase1609views
Textbook QuestionThe graph that follows shows the survival of four different E. coli strains after exposure to increasing doses of ultraviolet light. The wild-type strain is normal, but the other strains have a mutation in either a gene called uvrA, a gene called recA, or both. (b) What are the relative contributions of these genes to the repair of UV damage?990views
Textbook QuestionThe graph that follows shows the survival of four different E. coli strains after exposure to increasing doses of ultraviolet light. The wild-type strain is normal, but the other strains have a mutation in either a gene called uvrA, a gene called recA, or both. (a) Which strains are most sensitive to UV light? Which strains are least sensitive?797views
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