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Genetic Code and Regulation

Genetic Code and Regulation
The codons which do not specify an amino acid are called

termination code
none of these
propagation code
initiation code

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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?

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

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Genetic Code and Regulation
In some organelles in eukaryotes, the genetic code for some codons

are same
are partially same
None of these
differs from that used in prokaryotes

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Genetic Code and Regulation
Translation begins

at the replication fork
on the lagging strand
in nucleus
at the start codon

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Genetic Code and Regulation
Crick demonstrated that the genetic code involved three bases and suggested that the code was degenerated. What experimental technique Crick conducted to suggest genetic code degeneration?

Density gradient centrifugation
Gel electrophoresis
Restriction digests of the rII gene
Frameshift mutagenesis

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Genetic Code and Regulation
How many different codons are possible?

An infinite number
64
20
3

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