In order to obtain virus-free plants through tissue culture the best method is

• protoplast culture

• embryo rescue

• anther culture

• anther culture

A ‘new’ variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to

• Co-667

• Sharbati Sonora

• Basmati

• Lerma Rojo

Conversion of milk to curd improves its nutritional value by increasing the amount of

• Vitamin D

• Vitamin A

• Vitamin E

• Vitamin B₁₂

The two functional groups characteristic of sugars are

• Hydroxyl and methyl

• Carbonyl and methyl

• Carbonyl and hydroxyl

• Carbonyl and phosphate

Homozygous purelines in cattle can be obtained by

• mating of related individuals of same breed

• mating of unrelated individuals of same breed

• mating of individuals of different breed

• mating of individuals of different breed

The process of separation and purification of expressed protein before marketing is called

• Upstream processing

• Downstream processing

• Bioprocessing

• Bioprocessing

Artificial selection to obtain cows yielding higher milk output represents

• Stabilizing selection as it stabilizes this character in the population

• Directional as it pushes the mean of the character in one direction

• Disruptive as it splits the population into two one yielding higher output and the other lower output

• Disruptive as it splits the population into two one yielding higher output and the other lower output

In maize, hybrid vigour is exploited by

• bombarding the protoplast with DNA

• crossing of two inbreed parental lines

• harvesting seeds from the most productive plants

• harvesting seeds from the most productive plants

Golden rice is a promising transgenic crop. When released for cultivation, it will help in

• alleviation of vitamin A deficiency

• pest resistance

• herbicide tolerance

• herbicide tolerance

Which one of the following pairs is mismatched?

• Pila globosa - pearl

• Apis indica - honey

• kenia lacca - lac

• kenia lacca - lac