GENETIC CODE AND REGULATION QUIZ

How many amino acids will be encoded by 5' GAU GGU UGA UGU 3' sequence?

One

Three

Four

Two

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In prokaryotes, AUG encodes

alanine

methionine

N-formyl methionine

a stop codon

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In some organelles in eukaryotes, the genetic code for some codons

None of these

are same

are partially same

differs from that used in prokaryotes

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

5' TGGCAAT 3'

5' UAAGCCU3'

5' ATTGCCA 3'

5' TAACGGT 3'

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The genetic code is

species-specific

universal

universal except for rare exceptions in mitochondria and some protozoa

kingdom-specific

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In protein synthesis in prokaryotes

the initiating amino acid is methionine

the initiating amino acid is N- formyl methionine

the initiating amino acid is phenyl alanine

None of these

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Bacterial protein called catabolic activator protein (CAP) is an example of

second type of positive control of gene expression

positive control of gene expression

negative control of gene expression

None of these

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Codon that specify the amino acids often differs in the

third base

first base

second base

none of these

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The codons which do not specify an amino acid are called

initiation code

propagation code

none of these

termination code

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How many different codons are possible?

20

64

An infinite number

3

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