Which one of the following is used as a vector for cloning genes into higher organisms?

1. Baculovirus

2. Salmonella typhimurium

3. Rhizopus nigricans

4. Retrovirus

DNA or RNA segment tagged with a radioactive molecule is called:

Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?

1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines

One gene-one enzyme relationship was established for the first time in:

1. Neurosporacrassa

2. Salmonella typhimurium

3. Escherichia coli

4. Diplococcuspneumonia

One gene – one enzyme hypothesis was postulated by:

1. R. Franklin

2. Hershey and Chase

3. A. Garrod

4. Beadle and Tatum

Match the enzyme in column I with its function in column II and choose the correct option. 

1. A-2 B-1 C-4 D-3

2. A-3 B-2 C-1 D-4

3. A-3 B-4 C-1 D-2

4. A-1 B-2 C-4 D-3

Probes, used in DNA fingerprinting, are initially:

1. Single stranded RNA

2. Mini-satellite

3. 19 base long oligonucleotide

4. All of the above

Satellite DNA is a useful tool in:

1. Organ transplantation

2. Sex determination

3. Forensic science

4. Genetic engineering

Allelic sequence variation where more than one variant allele at a locus in. a human population with a frequency greater than 0.01 is referred to as:

1. DNA polymorphism

2. Multiple allelism

3. SNP

4. EST

The codon for anticodon 3'-UUUA-5' is:

1. 3'-AAU-5'

2. 5'-UAAA-3'

3. 5'-AAAU-3'

4. 3'-UAAU-5'