choose the correct answer 26. In eukaryotes, but not in prokaryotes, ribosomes f

Question

choose the correct answer

26. In eukaryotes, 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 translation c. mRNAs are not polyadenylated d. Ribosomes can start translating an mRNA molecule before transcription is complete

Explanation / Answer

26) The correct answer is option B that is scanning along the mRNA from 5' end.

27) The correct answer is option B that is ribosomes must bind to the 5'cap before initiating translation because prokaryotes don't have 5' cap.

Prokaryotic mRNA is polycystronic so they can code many protein from single mrna. So, A is wrong.

C is wrong statement because it is not polyadenylated.

D is wrong because transcription and translation occur simultaneously in prokaryotes.

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