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Translation and Regulation

Translation and Regulation
What are the Svedberg values for the subunits of the 70S ribosomes of E. colli?

40S and 20S
50S and 30S
50S and 20S
40S and 30S

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Translation and Regulation
Which of the following modified amino acid is used at the starting of most prokaryotic proteins?

N-formylmethionine
N-formylalanine
N-formylserine
N-formylleucine

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Translation and Regulation
Which of the following act as the blueprint or template for the process of protein synthesis that takes place on ribosomes?

mRNA
tRNA
rRNA
DNA

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Translation and Regulation
What is the action of tetracycline in prokaryotes?

Not known with certainity
It blocks translocation reaction on ribosomes
It blocks the binding of amino-acyl tRNA to the A site of ribosomes
It blocks peptidyl transferase reaction on ribosomes

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Translation and Regulation
Which of the following defines an open reading frame (ORF)?

A possible gene predicted by DNA sequencing
The sequence of a complete genome
A plasmid vector used in genome sequencing
A sequence of genome in bacteriophage

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Translation and Regulation
The interaction between the mRNA and tRNA determined the position of amino acid in a polypeptide sequence. This is called the

Wobble hypothesis
stagerivity
adaptor hypothesis
promiscuity

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