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

Which statement is correct for bacterial transduction:
 

Which steroid is used for transformation:

1. Cortisol

2. Cholesterol

3. Testosteron

4. Progesterone

In E. Coli, during lactose metabolism, the repressor binds to:

1. Regulator gene

2. Operator gene

3. Structural gene

4. Promoter gene