151.

Somaclones are prepared by

• callus culture

• sexual reproduction

• micropropagation

• somatic hybridisation

Genetically modified (GM) crops can be produced by

• recombinant DNA technology

• somatic hybridization

• cross breeding

• micropropogation

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

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.

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.

Assertion : Saccharomyces cerevisiae produces acetic acid.

Reason : Trichoderma polysporum produces blood cholestrol lowering agent.

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

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

• If assertion is true but reason is false.

• If both assertion and reason are false.

Select the correct statement.

• Acetobacter aceti produces citric acid

• Saccharomyces cerevisiae is used as clot buster

• Penicillium notatum restrict the growth of Staphylococci

• Methanogens are found in aerobic conditions

First clinical gene therapy was given in 1992 to a 4 years old girl for

• adenine deficiency

• growth deficiency

• adenosine deaminase deficiency

• adenosine deficiency

The first bioherbicide developed in 1981 was based on

• Phytophthora palmivora

• Phytophthora infestans

• Bacillus thuringiensis

• Azadirachta indica

Assertion: A gene from Bacillus thuringiensis is incorporated in plant genome to increase their yield.

Reason: Bacillus thuringiensis has Bt toxin producing gene, which kills the larva of insects

• 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.