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PROTEIN SYNTHESIS

Protein Synthesis
The lac operon contains the z, y and a structural genes

encoding P-galactosidase only
None of these
encoding p-galactosidase, galactose permeases and thio-galactosidase transacetylase respectively
encoding p-galactosidase and galactose permeases

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Protein Synthesis
Proteins contain __________ different amino acids, whereas DNA and RNA are composed of __________ different nucleotides

20,64
20,4
3,20
4,20

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Protein Synthesis
Which of the following is not necessary for protein synthesis to occur, once transcription is completed?

tRNA
Ribosomes
DNA
mRNA

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Protein Synthesis
Ribosomes select the correct tRNAs

depending on their abundance in the cytosol
then bind to the appropriate mRNA
solely on the basis of their anticodons
with the least abundant anticodons

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Protein Synthesis
Signal peptide protein removal that is translocated across a membrane is accomplished by

signal peptidase
chymotrypsin
fMet aminopeptidase
trypsin

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