The thermostable enzymes, Taq and Pfu, isolated from thermophilic bacteria are

• RNA polymerases

• DNA ligases

• DNA polymerases

• Restriction endonucleases

Select the correct match

• Alec Jeffreys - Streptococcus pneumoniae

• Alfred Hershey and Martha Chase - TMV

• Francois Jacob and Jacques Monod - Lac operon

• Matthew Meselson and F. Stah - Pisum sativum

Select the correct statement

• Franklin Stahl coined the term ‘‘linkage’’

• Punnett square was developed by a British scientist

• Transduction was discovered by S. Altman

• Spliceosomes take part in translation

One of the breeding techniques useful to eliminate harmful recessive genes by selection is

• Artificial insemination

• Outbreeding

• Inbreeding

• MOET

Minisatellites or VNTR's are used in

• DNA fingerprinting

• Polymerase chain reaction, (PCR)

• gene therapy

• Gene mapping

In the lac operon model, lactose molecules function is

• inducers,which bind with the operator gene

• Repressors, which bind the the operator gene

• inducers, which bind the repressor protein

• corepressore, which bind with the repressor protein

The largest gene in man is

• Insulin gene

• Tumour suppressor gene

• Beta globin gene of haemoglobin

• Dystrophin

Herbicide-resistant gene in a plant is

• Mt

• Gt

• Ct

• Bt

Which has an additional X-chromosome?

• Turner’s syndrome

• Klinefelter’s syndrome

• Super female

• Down’s syndrome

Polyploidy can be induced by the application of

• Auxin

• Kinetin

• Colchicine

• Ethylene