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?

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

Jacob and Monad studied lactose metabolism in E.Coli and proposed the Operon concept. The Operon concept is applicable to:

1. All prokaryotes

2. All prokaryotes and some eukaryotes

3. All prokaryotes and all eukaryotes

4. All prokaryotes and some protozoans

Exon part of m-RNAs have code for:

1. Protein

2. Lipid

3. Carbohydrate

4. Phospholipid

Which of the following is the initiation codon:

1. UAG

2. AUC

3. AUG

4. CCU

The method of DNA replication in which two strands of DNA separate and synthesize new strands is called:

1. Dispersive

2. Conservative

3. Semiconservative

4. Non-conservative

Which of the following is correct about H-bonding in nucleotide:
1.  A–T G–C
2.  A–G T–C
3.  G–T A–C
4.  A–A T–T

Chargaff's rule states that in an organism:

In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids:

1. 20

2. 64

3. 61

4. 60