choose the correct answer es, but not in prokaryotes, ribosomes find the start s
ID: 266454 • Letter: C
Question
choose the correct answer
es, but not in prokaryotes, ribosomes find the start site of translation by? a. binding directly to a ribosome-binding site preceding the initiation codon b. scanning along the mRNA from the 5' end c recognizing an AUG codon as the start of translation. d. binding an initiator tRNA 27.Which of the following statements about prokaryotic mRNA molecules is FALSE? a. A single prokaryotic mRNA molecule can be translated into several proteins b. Ribosomes must bind to the 5' cap before initiating translat c. mRNAs are not polyadenylated d. Ribosomes can start translating an mRNA molecule before transcription is complete Use the following diagram of an mRNA molecule to answer questions 28-30 2. 28. This mRNA would be found in a(n)? a. Prokaryote b. Eukaryote 29. The regions labeled with number 5 are? a. Ribosome binding sites b. Initiator codons c. 3' untranslated regions d. 5' untranslated regions e. Protein coding regions 30. The region labeled with number 1 is a(n)? d. 5' untranslated region e. Protein coding region a. Ribosome binding site b. Initiator codon c. 3' untranslated region 31. Which of the following statements about the Lac operon is FALSE? a. The Lac repressor binds when lactose is present in the cell b. Even when the CAP activator is bound to DNA, if lactose is not present, the Lac operon will not be transcribed c. The CAP activator can only bind DNA when it is bound to cAMP d. The Loc operon only produces RNA when lactose is present and glucose is absentExplanation / Answer
31. Answer iis 'a'. Lac repressor can't bind to operator when lactose is present in the cell
30. Answer is 'a'. Ribosomal binding sites facilitate the binding of RNA to Ribosomes that allows translation
29. Answer is 'e'. Protein coding region
28. Answer is 'A'. Poly Cistronic RNA found in Prokaryotes
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