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:
1. | L-shaped | 2. | S-shaped |
3. | Y-shaped | 4. | E-shaped |
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:
1. | Transfer of some genes from one bacteria to another bacteria through virus |
2. | Transfer of some genes from one bacteria to another bacteria by conjugation |
3. | Bacteria obtained their DNA directly |
4. | Bacteria obtained DNA from other external sources |
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