Heteroduplex formation Study guides, Revision notes & Summaries

With reference to aberrant methylation of bases which of the following statements, if any, is false? A. S-adenosylmethionine donates methyl groups to a range of different molecules in cells and frequently inappropriately methylates bases in DNA. B. Guanine is occasionally methylated to give O-6-methylguanine which base pairs with adenine rather than with cytidine. C. In each nucleated cell, about 300-600 adenines are converted to 3-methyladenine per day. D. 3-methyladenine can be a cytotoxic...

Genetics Exam 2 practice exam 107 Questions with Verified Answers In five Hfr strains, each of which was used to build a time-of-entry map, the genes entered the recipient cells as follows: Strain 1: S L A C T F Strain 2: N P F T C A Strain 3: T F P N U Y Strain 4: S H Y U N P Strain 5: U N P F T C Which of the following represents a correct compilation of these results? A) S L A C T F P N H C U B) N P F T S L A C H U T C) T C A L S P N U Y H D) U N P F T C A L S T F E) S L A C T F...

Genetics Exam 3 Practice Test 50 Questions with Verified Answers Gene conversion results from A. Discontinuous replication B. Photoreactivation C. Mismatch repair D. Gap Repair E. C and D - CORRECT ANSWER E. C and D The picture below is two Holliday junctions in a pair of DNA molecules undergoing recombination Breakage and rejoining of the strands indicated by the arrows () and () results in crossover. A. 1 and 2 B. 2 and 3 C. 3 and 4 - CORRECT ANSWER B. 2 and 3 In eukaryoti...

Genetics Exam 2 practice exam 107 Questions with Verified Answers In five Hfr strains, each of which was used to build a time-of-entry map, the genes entered the recipient cells as follows: Strain 1: S L A C T F Strain 2: N P F T C A Strain 3: T F P N U Y Strain 4: S H Y U N P Strain 5: U N P F T C Which of the following represents a correct compilation of these results? A) S L A C T F P N H C U B) N P F T S L A C H U T C) T C A L S P N U Y H D) U N P F T C A L S T F E) S L A C T F...

Genetics Exam 3 Practice Test 50 Questions with Verified Answers Gene conversion results from A. Discontinuous replication B. Photoreactivation C. Mismatch repair D. Gap Repair E. C and D - CORRECT ANSWER E. C and D The picture below is two Holliday junctions in a pair of DNA molecules undergoing recombination Breakage and rejoining of the strands indicated by the arrows () and () results in crossover. A. 1 and 2 B. 2 and 3 C. 3 and 4 - CORRECT ANSWER B. 2 and 3 In eukaryoti...

With reference to aberrant methylation of bases which of the following statements, if any, is false? A. S-adenosylmethionine donates methyl groups to a range of different molecules in cells and frequently inappropriately methylates bases in DNA. B. Guanine is occasionally methylated to give O-6-methylguanine which base pairs with adenine rather than with cytidine. C. In each nucleated cell, about 300-600 adenines are converted to 3-methyladenine per day. D. 3-methyladenine can be a cytotoxic...

The enzyme that primes DNA synthesis is: DNA primase Which of the following is a common hydrogen bond acceptor? a) A carbonyl b) Primary amine c) Hydroxyl d) Tertiary amine b) Primary amine What assay is a signal amplification test and uses Alkaline Phosphatase? a) Branched DNA b) TMA c) PCR d) NASMA e) LCR a) Branched DNA Which one of the following complementary pairings is incorrect? a) A=T b) G=C c) U=T d) A=U c) U=T This highly polymorphic l...

(chapter5) Microbiology Test 2 1. Which growth phase has the largest increase in cell numbers per unit of time? death phase exponential phase lag phase stationary phase In which growth p hase is there no increase or decrease in cell number because some cells are dividing while others are dying? death phase exponential phase lag phase stationary phase To speed up the growth rate in a chemostat, the should be increased. To increase the cell density as well, the should be increased. A. dilution rat...

A summary of the lectures covering the human genome, genetic variation and homologous and non-homologous recombination.