The proof for the triplet nature of codon was given by

1. George Gamow

2. Har Gobind Khorana

3. Marshall Nirenberg’s

4. Watson and Crick

Which of the following enzyme can be used for the polymerisation of RNA in a template independent manner

1. RNA Polymerase

2. RNA primase

3. polynucleotide phosphorylase

4. RNA phosphatase

codons are generated by 4 nitrogenous bases using laws of

1. Probability

2. Number system

3. Permutation and combination

4. Binomial theorem

How many statements are correct?

1. Codons are always triplet.
2. there are total 64 codons code for amino acids.
3. Codon is read in mRNA in non- contagious fashion.
4. Code is nearly universal.
5. Some amino acids are coded by more than one codon
6. Codon is ambiguous

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

Which of the following is incorrect option

1. A change of single base pair in the gene results in the change of amino acid in case sickle cell anemia

2. In case sickle cell anemia charged amino acid is changed to non polar amino acid

3. amino acid residue glutamine is changed to valine

4. Sickle cell anemia is an example of point mutation

The change in the reading frame will depend on

1. no of bases deleted

2. no of bases added

3. no of bases deleted or added

4. always change the reading frame either bases are deleted or added

tRNA acts as

1. adapter RNA

2. structural RNA

3. matured RNA

4. messenger RNA

Which is correct about tRNA

1. It has amino acid acceptor end

2. It has codon loop

3. It has 2 strands

4. there are 64 tRNA for 64 codons

tRNA looks like

1. clover-leaf

2. L shaped

3. inverted L shaped

4. a and c