1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

Following are the steps involved in action of toxin in Bt. Cotton

A. The inactive toxin converted into active form due to alkaline pH of gut of insect.

B. Bacillus thuringiensis produce crystals with toxic insecticidal proteins.

C. The alkaline pH solubilises the crystals.

D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect.

E. The toxin proteins exist as inactive protoxins in bacteria.

Choose the correct sequence of steps from the options given below:

A
$$\mathrm{E} \rightarrow \mathrm{C} \rightarrow \mathrm{B} \rightarrow \mathrm{A} \rightarrow \mathrm{D}$$
B
$$\mathrm{B} \rightarrow \mathrm{C} \rightarrow \mathrm{A} \rightarrow \mathrm{E} \rightarrow \mathrm{D}$$
C
$$\mathrm{A} \rightarrow \mathrm{E} \rightarrow \mathrm{B} \rightarrow \mathrm{D} \rightarrow \mathrm{C}$$
D
$$\mathrm{B} \rightarrow \mathrm{E} \rightarrow \mathrm{C} \rightarrow \mathrm{A} \rightarrow \mathrm{D}$$
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1

What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism?

A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.

B. It may get integrated into the genome of the recipient.

C. It may multiply and be inherited along with the host DNA.

D. The alien piece of DNA is not an integral part of chromosome.

E. It shows ability to replicate.

Choose the correct answer from the options given below:

A
A and B only
B
D and E only
C
B and C only
D
A and E only
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Which of the following are fused in somatic hybridization involving two varieties of plants?

A
Callus
B
Somatic embryos
C
Protoplasts
D
Pollens
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1

Match List I with List II

List - I List - II
A. $$\alpha$$ -I antitrypsin I. Cotton bollworm
B. Cry IAb II. ADA deficiency
C. Cry IAc III. Emphysema
D. Enzyme replacement therapy IV. Corn borer

Choose the correct answer form the options given below:

A
A-II, B-I, C-IV, D-III
B
A-III, B-I, C-II, D-IV
C
A-III, B-IV, C-I, D-II
D
A-II, B-IV, C-I, D-III
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