Genetically modified (GM) crops can be produced by

• recombinant DNA technology

• somatic hybridization

• cross breeding

• micropropogation

Assertion : The technique of micropropogation has been used to introduce variations in the offspring.

Reason : It is not possible to generate virus free plants by micropropogation.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false

• If both assertion and reason are false

Wine and beer are produced directly by fermentation whereas brandy and whisky require both fermentation and distillation. This is because

• fermentation is inhibited at an alcohol level of 10-18%

• distillation prolongs storage

• distillation improves quality

• distillation purifies the beverage.

The number of chromosomes present in the cells of the bread wheat, Triticum aestivum suggests that it is

• hexaploid

• diploid

• tetraploid

• pentaploid

Which organism is used to transfer T-DNA

• Streptomyces hygroscopicus

• Agrobacterium tumefaciens

• Salmonella typhi

• Escherichia coli

Assertion: GM foods are facing widespread resistance by the people.

Reason: GM foods have mutated genes which cause infections and allergies.

• If both assertion and reason are true and reason is the correct explanation of assertion. 

• If both assertion and reason are true but reason is not the correct explanation of assertion. 

• If assertion is true but reason is false. 

• If both assertion and reason are false.

What is true about Bt toxin

• Bt protein exists as active toxin in the Bacillus.

• The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication.

• The concerned Bacillus has antitoxins.

• The inactive protoxin gets converted into active form in the insect gut

Assertion: GM crops can affect human health by causing allergic reactions.

Reason: Transgenes in commercial crops can endanger native species e.g., the Bt toxin gene expressed in pollen might endanger pollinators like honeybees.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which of the following represents the action of insulin?

• Increases blood glucose level by stimulating glucagon production

• Decreases blood glucose level by forming glycogen

• Increases blood glucose level by promoting cellular uptake of glucose

• Increases blood glucose level by hydrolysis of glycogen

Somaclones are prepared by

• callus culture

• sexual reproduction

• micropropagation

• somatic hybridisation