CELL BIOLOGY. Please answer the following questionsand please please please be 1
ID: 215206 • Letter: C
Question
CELL BIOLOGY. Please answer the following questionsand please please please be 100% sure on them. if not, plz dont answer it. thank you so much.
33. RNA in cells differs from DNA in that ptide bonds b.) RNA contains the base uracil, which pairs with adenine c. the sugar ribose contains fewer hydroxyls than deoxyribose d all of the above 34. What is the order of the steps of gene expression in prokaryotic organism (a. Transcription, translation b. Translation, transcription e Translation, RNA processing, transcription . Transcription, RNA processing, translation 35. Which of the following best describes the fun ction of the sigma subunit of the prokaryotic RNA polymerase? a. It is required for transcription terminatiorn It is essential for elongation of the RNA transcript It is essential for the recognition of and binding to the promoter sequence during transcription All of the above b. d. What is the signal for transcription termination in prokaryotes? a. Release factors b. Getting to the end of the DNA strands c.) The terminator sequence d. The stop codon 31Which is the main eukaryotic RNA polymerase that transcribes genes encoding proteins? a. RNA Polymerase RNA Polymerase llI All of the above c. RNA Polymerase II t signals transcription termination inds d. sset is the function of TBD as part of TFlD during eukaryotic transcription? t acts as a topoisomerase to start off transcription initiation to the TATA box in the promoter to get initiation started and recruit other transcription acis as a helicase to start of transcription elongationExplanation / Answer
Dear student, here is the right answer for you:
33. RNA molecule contain the uracil while DNA molecule contain thymine. so in RNA uracil pair with adenine with 2 hydrogen bond. so the option b is correct.
34.in prokaryotes both transcription and the translation process occur in cytoplasm . in prokaryotes transcription and translation both process occur simultanously, no RNA processing occur in prokaryotes. so according to option, a is correct.
35. DNA dependent RNA synthesis is catalyzed by the enzyme RNA polymerase. RNA polymerase is an enzyme which consist of 5 subunit. alpha, B, B', OMEGA, and sigma factor. function of alpha subunit is assembly of core enzyme, B and B' subunit act as a catalytic centre. the function of omega is assembly of RNA Polymerase and thr function of the sigma subunit is promotor recognition and transcription initiation. so option C is correct.
36. IN DNA terminator sequence is present. at that point the enzyme stop adding nucleotide to the growing RNA chain, release the completed product and dissociate from the DNA template. so option C is correct in given option.
37. RNA Polymerase II initiate the transcription in eukaryotes. the gene transcribed by RNA Polymarase II first bind with the general transcription factor and after binding of all the transcription factor initiation of transcription start by RNA Polymerase II. Option B is correct.
38. TBP (Tata Binding Domain) is a sequence specific protein that bind to the DNA via its unusual TBP domain, which make contact with the minor groove in the region of TATA box . and after binding all the transcription factor it initiate the transcription. as given option C is correct.