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Protein Synthesis

Protein Synthesis
Which of the following has unusual bases?

mRNA
hnRNA
rRNA
tRNA

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

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

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Protein Synthesis
The growing polypeptide chain is released from the ribosomes when

a chain terminating codon is reached
the 7-methyl guanosine cap is reached
a chain terminating tRNA binds to the ribosome
the poly A tail is reached

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Protein Synthesis
The structure in a bacterium that indicates an active site for protein synthesis is

a chromosome.
a cell membrane,
a polysome.
a flagellum.

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Protein Synthesis
A polysome could be best described as

an active site of protein synthesis.
an active site of lipid synthesis.
All of these
an active site of DNA synthesis.

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Protein Synthesis
The site on a bacterial chromosome that marks the termination point for chromosome replication is called

pau
ter
a stem-loop
a stop codon.

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