Match each item in Column I with one item in Column II and chose your answer from the codes given below:

Codes

             I           II         III         IV

(1)         1           2           3           4

(2)         2           1           4           3

(3)         2           1           3           4

(4)         1           2           4           3

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a triplet?

1. Nirenberg and Matthaei

2. Hershey and chase

3. Morgan and Sturtevant

4. Beadle and Tatum

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.

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)

If a codon consists of 3 bases and there are 5 different nitrogenous bases altogether. How many codons will be there?

(1)61

(2)125

(3)27

(4)64