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Genetic Code and Regulation

Genetic Code and Regulation
How many different codons are possible?

3
20
64
An infinite number

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Genetic Code and Regulation
The genetic code is degenerated. Which of the following codons represents the principle of degeneracy?

CAU and CAC
UUA and UUC
AUG and AUA
UAA and UAC

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Genetic Code and Regulation
AUG codes for methionine act as a

initiation code
propagation code
termination code
elongation code

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Genetic Code and Regulation
Codon that specify the amino acids often differs in the

none of these
third base
second base
first base

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Genetic Code and Regulation
In protein synthesis in prokaryotes

None of these
the initiating amino acid is N- formyl methionine
the initiating amino acid is methionine
the initiating amino acid is phenyl alanine

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Genetic Code and Regulation
Which of the following techniques was carried out by Nirenberg and Matthaei in 1961 to determine the first codon?

Mixed co-polymer mRNA synthesis
Labeled peptide binding to a ribosome
None of these
In vitro synthesis of a polypeptide using UUUUU

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