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