MCQ on BT Cotton | Transgenic Plants - Applications of Biotechnology MCQ

1. The prefix of  'Bt 'means:

A) Bigger thread

B) Biotechnology

C) Barium treated

D) Bacillus thuringiensis

 

2. Some of the characteristics of Bt cotton are :

A) High yield and production of toxic protein crystals which kill dipteran pests

B) High yield and resistance to bollworms

C) Long fibre and resistance to aphids

D) Medium yield, long fibre and resistance to beetle pests

 

3. What is true about Bt toxin?

A) The concerned Bacillus has antitoxins

B) The inactive protoxin gets converted into an active form in the insect gut

C) Bt protein exists as an active toxin in the Bacillus

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

 

4. Some of the characteristics of Bt cotton are :

A) High yield and production of toxic protein crystals which kill dipteran pests

B) High yield and resistance to bollworms

C) Long fibre and resistance to aphids

D) Medium yield, long fibre and resistance to beetle pests

 

5. The Bt toxin does not kill the Bacillus because the Bt toxin protein exist as inactive--
A) protein
B) protoxins
C) prion
D) particle

 

6. Cry1 endotoxins obtained from Bacillus thuringiensis are effective against:-

A) Flies

B) Nematodes

C) Boll worms

D) Mosquitoes

 

7. Bacillus thuringiensis forms protein crystals that contain insecticidal protein. This protein :

A) does not kill the carrier bacterium which is itself resistant to this toxin

B) binds with epithelial cells of the midgut of the insect pest ultimately killing it

C) is coded by several genes including the gene cry

D) is activated by the acid pH of the foregut of the insect pest

 

8. Bt. toxin does not show the harmful effect on human and non-target insects, because:-

A) It is non-toxic to animal and human

B) Its receptors are not present in humans

C) Humans and other animals have resistance against Bt. toxins

D) Acidic nature of stomach and absence of specific receptor on human gut

 

9. Bacillus thuringiensis strains have been used for designing novel-

A) biofertilizers

B) bio insecticidal plants

C) biomineralization 

D) bio metallurgical techniques

 

Learn more: MCQ on Transgenic Plants

Answers:

1. D) Bacillus thuringiensis

2. B) High yield and resistance to bollworms

3. B) The inactive protoxin gets converted into active form in the insect gut

4. B) High yield and resistance to bollworms

5. B) protoxins

6. C) Boll worms

7. B) binds with epithelial cells of the midgut of the insect pest ultimately killing it

8. D) Acidic nature of stomach and absence of specific receptor on human gut

9.B) bio insecticidal plants

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