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

Which of the following is nonsense codon?

(1) UAG

(2) UAA

(3) UGA

(4) all the above

AUG codes for

(1) valine

(2) histidine

(3) phenylalanine

(4) methionine

A codon consists of three nitrogenous bases and there are four kind of bases in nucleic acid altogether. How many codons will be there?

(1)60

(2)4³

(3)34

(4)46

Which of the following codons has a dual role in the genetic code?

(1) AUG

(2) GUG

(3) CUG

(4) UUG

Which of the following is not a stop codon?
1. UAA

2. UGA

3. UAC

4. UAG

Match the triplet codons listed in column I with their amino acids mentioned in column II and select the correct option from the given codes.

(1) A-(v), B-(iii), C-(i), D-(ii)

(2) A-(v), B-(iii), C-(i), D-(iv)

(3) A-(ii), B-(iv), C-(i), D-(v)

(4) A-(i), B-(ii), C-(iii), D-(iv)

Frameshift mutation occurs when

(1) base is substituted

(2) base is deleted or added

(3) anticodons are absent

(4) none of these

codons are generated by 4 nitrogenous bases using laws of

(1)Probability

(2)Number system

(3)Permutation and combination

(4)Binomial theorem

Which of the following is correct regarding genetic code?

(1) UUU is the initiation codon which also codes for phenylalanine.

(2) There are 64 triplet codons and only 20 amino acids.

(3) Three random nitrogen bases specify the placement of one amino acid.

(4) UAA is the nonsense codon which also codes for methionine.