After a mutation at a genetic locus, the character of an organism changes due to the change in:

1. DNA replication

2. Protein synthesis pattern

3. RNA transcription pattern

4. Protein structure 

Gene is composed of:
1.  Amino acids
2.  Polynucleotide
3.  Fatty acid
4.  Nitrogen bases

Which form of RNA has a structure resembling clover leaf?

1. hn-RNA

2. m-RNA

3. t-RNA

4. r-RNA

The molecular weight of DNA in yeast is:

1. $2.$ $56$ $\times$ ${10}^9$

2.  $0.5$ $$ $\times$ ${10}^9$

3. $7$ $\times$ ${10}^7$

4. $6$ $\times$ ${10}^6$

In inducible operon, regulatory gene synthesizes:
1. Promoter
2. Operator
3. Repressor
4. Aporepressor

The similarity between DNA and RNA is that both:

1. are polymers of nucleotides

2. have a similar pyrimidine

3. have similar sugars

4. genetic material

Length of one loop of B-DNA:

1. 3.4 nm.

2. 0.34 nm.

3. 20 nm.

4. 10 nm

Anticodon occurs in:

1. t-RNA

2. m-RNA

3. rRNA

4. DNA

In a three-dimensional view, the molecule of t-RNA is:

The transformation experiment was first performed on which bacteria:

1. E. coli

2. Diplococcus pneumoniae

3. Salmonella

4. Pasteurella pestis