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Genetic Code and Regulation

Genetic Code and Regulation
How many different codons are possible?

64
20
An infinite number
3

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Genetic Code and Regulation
Translation begins

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

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

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

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Genetic Code and Regulation
The sequence of one strand of DNA is: 5' ATTGCCA 3', what is the sequence of the other strand?

5' UAAGCCU3'
5' TAACGGT 3'
5' ATTGCCA 3'
5' TGGCAAT 3'

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

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

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Genetic Code and Regulation
The genetic code is

universal except for rare exceptions in mitochondria and some protozoa
species-specific
kingdom-specific
universal

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