Which form of RNA has a structure resembling clover leaf?
1. hn-RNA
2. m-RNA
3. t-RNA
4. r-RNA
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
In E. Coli, during lactose metabolism, the repressor binds to:
1. Regulator gene
2. Operator gene
3. Structural gene
4. Promoter gene
If the DNA percentage of thymine is 20%, then what is the percentage of guanine?
1. | 20% | 2. | 40% |
3. | 30% | 4. | 60% |
Out of 64 codons, 61 codons code for 20 types of amino acids. This is often called:
1. Degeneracy of genetic code
2. Overlapping of gene
3. Wobbling of codon
4. Universality of codons