SCNM BIOCHEM EXAM 1 QUESTIONS WITH COMPLETE ANSWERS

1 of 28

Term



All are components required for peptide chain initiation EXCEPT
A: mRNA
B: 30s and 50s ribosomal subunits
C: Initiation factors
D: GTP and F-met tRNA IFMET
E: All are true

, D C




E B


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2 of 28

Term



The shine-delgarno sequence found in prokaryotic systems resides
on the __ end of __ and is the __ site
A: 3', peptide-tRNA, formyl transferase
B: 5', DNA, polyperaceyl binding
C: 3', RNA, initiation factor binding
D: 5', mRNA, ribosome binding
E: 3', amino acetyl tRNA, formylmethionine binding




E D




C B


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3 of 28

, Term



All are characteristics of eukaryotic mRNA except:
A: Poly(a) tail
B: No shine-delgardo sequence
C: Codon-binding directs for initiator tRNA carrying MET
D: 5'-7methyl-GTP cap
E: all are characteristics




D C




B E


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4 of 28

Term


Peptidyl transferase catalyzes the reaction in which the neuliophile
is:
A: oxygen in the carboxylate group of the amino acetyl tRNA
B: Amino nitrogen in the amino acetyl t-RNA
C: amino nitrogen from the peptidyl tRNA
D: Oxygen in the carboxylate group of the peptidyl tRNA
E: electron pair on a ring N atom of the purine A 2451