Genetic Code and Regulation

Question: In some organelles in eukaryotes, the genetic code for some codons
[A].

differs from that used in prokaryotes

[B].

are same

[C].

are partially same

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: In protein synthesis in prokaryotes
[A].

the initiating amino acid is N- formyl methionine

[B].

the initiating amino acid is methionine

[C].

the initiating amino acid is phenyl alanine

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: Codon that specify the amino acids often differs in the
[A].

first base

[B].

second base

[C].

third base

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: AUG codes for methionine act as a
[A].

initiation code

[B].

elongation code

[C].

termination code

[D].

propagation code

Answer: Option A

Explanation:

No answer description available for this question.

Question: Bacterial protein called catabolic activator protein (CAP) is an example of
[A].

negative control of gene expression

[B].

positive control of gene expression

[C].

second type of positive control of gene expression

[D].

none of the above

Answer: Option C

Explanation:

No answer description available for this question.

Question: In prokaryotes, AUG encodes
[A].

methionine

[B].

N-formyl methionine

[C].

a stop codon

[D].

alanine

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following techniques was carried out by Nirenberg and Matthaei in 1961 to determine the first codon?
[A].

In vitro synthesis of a polypeptide using UUUUU

[B].

Labeled peptide binding to a ribosome

[C].

Mixed co-polymer mRNA synthesis

[D].

none of the above

Answer: Option A

Explanation:

No answer description available for this question.

Question: 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?
[A].

Gel electrophoresis

[B].

Density gradient centrifugation

[C].

Frameshift mutagenesis

[D].

Restriction digests of the rII gene

Answer: Option C

Explanation:

No answer description available for this question.