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PROTEIN SYNTHESIS

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

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

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

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

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

DNA
Ribosomes
mRNA
tRNA

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Protein Synthesis
Ribosomes select the correct tRNAs

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

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

fMet aminopeptidase
chymotrypsin
signal peptidase
trypsin

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