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BIO 340 MIDTERM EXAM NEWEST 2025
COMPLETE QUESTIONS AND ANSWERS
(VERIFIED ANSWERS ) |ALREADY GRADED
A+
How does the cell identify the position of introns in an immature RNA? - ANSWER-special sequences are located near the splicing sites that are recognized by snRNPs
canal bodies in the eukaryotic cell nucleus.. - ANSWER-speed up the maturation and assembly of snRNPS and snoRNPS
which of the following types of noncoding RNA chiefly functions in the processing and chemical modification of ribosomal RNAs? - ANSWER-small nucleolar RNAs
initiation of translation begins when the.. - ANSWER-ribosomal small subunit holding an initiator tRNA binds to the 5'end of the mRNA
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what is the initiator triplet in both prokaryotes and eukaryotes and what is the amino acid code for by this triplet? - ANSWER- AUG, methionine
which type of RNA molecule carries an amino acid to the ribosome? - ANSWER-tRNA
The enzymatic activity of peptide transferase is important in... - ANSWER-peptide bond formation during protein synthesis
erthromycin is a prokaryotic specific translation inhibitor that is used as an antibiotic. it binds within the polypeptide exit channel of the prokaryotic ribosome and prevents entrance of growing polypeptide. at which of the following steps in translation would it most likely stop translation? - ANSWER-subsequent rounds of elongation in which the carboxyl end of the growing polypeptide chain is released from the P-site tRNA and joined to the free amino group of the amino acid linked o the A site of tRNA
An elongating ribosome is bound to appropriate tRNAs in both the A and the P site and is ready for peptidyl transfer. what happens next? - ANSWER-the carboxyl end of the polypeptide chain is released from the P site tRNA and joined to the free amino group of the amino acid linked to the A site tRNA
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