A student wants to study metaphasic behaviour of chromosomes in a living cell. The technique most suitable is :

• phase contrast microscope

• x-ray microscope

• cell fractionation

• scanning electron microscope

Vaccines prepared by genetic engineering are safe to man because they are

• least active form of virus

• active form of virus

• coat protein formed as antibody

• All of the above

The principal cereal crop of India/Asia is :

• Sorghum

• barley

• wheat

• rice

Major coffee producing state of India is :

• Tamil Nadu

• Kerala

• Karnataka

• Andhra Pradesh

Which statement is incorrect ?

• Plant viruses contain RNA

• Animal viruses contain DNA

• T₄ contains double strand DNA

• TMV contains double stranded RNA

The molecular structure of insulin was first described by :

• Korenberg

• Swaminathan

• Richardson

• Sanger

Insect resistance transgenic cotton has been produced by inserting a piece of DNA from:

• an insect

• a bacterium

• a wild relative of cotton

• a virus

The term genetic engineering is used for :

• blotting technique

• RNA reaction technique

• protein synthesis technique

• recombinant technique

Genetically engineered human insulin is called

• humulin

• haematin

• hybridoma

• hybrid

Humulin is a :

• form of chitin

• human insulin

• digestive enzyme

• antibiotics