The one aspect which is not a salient feature of genetic code, is its being

(1) degenerate

(2) ambiguous

(3) universal

(4) specific

What is not true for genetic code?

1. A codon in mRNA is read in a non-contiguous fashion

2. It is nearly universal

3. It is degenerate

4. It is unambiguous

Which of the following is nonsense codon?

(1) UAG

(2) UAA

(3) UGA

(4) all the above

During portein synthesis in an organism at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three colud bring about this halt.

(1) UUU, UCC, UAU

(2) UUC, UUA, UAC

(3) UAG, UGA, UAA

(4) UUG, UCA, UCG

What would happen, if in a gene encoding a polypeptide of 50 amino acids, 25^th codon (UAU) is mutated to UAA?

(1) A polypeptide of 49 amino acids will be formed

(2) A polypeptide of 25 amino acids will be formed

(3) A polypeptide of 24 amino acids will be formed

(4) Two polypeptides of 24 and 25 amino acids will be formed

AUG codes for

(1) valine

(2) histidine

(3) phenylalanine

(4) methionine

How many statements are correct?

(1) 5

(2) 2

(3) 3

(4) 4

Codon is

(1)unambiguous and non specific

(2)non degenerate

(3)unambiguous and degenerate

(4)non universal and non degenerate

The fact that the genetic code is almost universal in living organisms is considered to be evidence that all organisms:
(1) Are evolutionarily related

(2) Are genetically identical

(3) Have the same sequence of anticodons

(4) None of the above

The prediction of sequence of amino acid is _____A ____ if the sequence of nucleotides mRNA is known. The prediction of sequence of nucleotide is concerned mRNA is ____B____ because the genetic code is _____C_____:
(1) A - possible, B - impossible, C - universal

(2) A - possible, B - impossible, C - degenerate

(3) A - impossible, B - possible, C - universal

(4) A - impossible, B - possible, C - degenerate