CELL BIOLOGY. Please answer the following questions and please please please be

Question

CELL BIOLOGY. Please answer the following questions and please please please be 100% sure on them. if not, plz dont answer it. thank you so much.

So that the cell can easily detect and correct thymidine dliel It is not known why DNA contains thymine instead of uracil d. 1. What is the advantage of homologous recombination over non-homologous recombination in the rep double strand breaks? a. Homologous recombination is faster and easier Homologous recombination repairs the double strand break perfectly with no errors Homologous recombination introduces variability during double strand break repair b. c. d. All of the above 12. RNA in cells differs from DNA in that a. b. RNA contains the base uracil, which pairs with adenine the sugar ribose contains fewerhydroxyls than deoxyribose the nucleotides are linked together via peptide bonds all of the above c. d. . Which of the following best describes the function of the sigma subunit of the prokaryotic RNA pol a. It is essential for elongation of the RNA transcript b. It is essential for the recognition of and binding to the promoter sequence during transc initiation C. It is required for transcription termination d. All of the above tion elongation?

Explanation / Answer

41. b

homologous recombination takes place during replication which is why it is accurate and repairs double strand breaks with no errors

42. a; RNA has uracil instead of thymine

43. b, sigma is required only fo initiation, it leaves after the initiation is complete

44. c; tanscription is synthesis of mRNA using a DNA template which is one of the two DNA strands

45. terminator sequences (stop codons terminate translation)

46. RNA polymerase II

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