NEET · Biology · STD 12 - 10. biotechnology and its application

The toxin proteins, isolated from Bacillus thuringiensis, coded by which of the following genes would control cotton bollworms and corn borer, respectively ?

A crylAc and crylAb
B crylAc and cryllAb
C crllAb and crylAc
D crylAc and crylllAb

Verified Solution

Answer & Solution

Correct Answer

(A) crylAc and crylAb

Step-by-step Solution

Detailed explanation

(A) cryIAc and cryIAb
The toxin proteins encoded by the genes cryIAc and cryIAb control the cotton bollworms.
The toxin protein encoded by the gene cryIAb controls the corn borer.
Therefore, the genes that control cotton bollworms and corn borer respectively are cryIAc and cryIAb

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List I with List II :

List I	List II
A. Decomposition	I. Accumulation of dark coloured amorphous colloidal substance
B. Detritus	II. Release of inorganic nutrients by the activity of microbes in soil
C. Mineralisation	III. Breaking down of complex organic matter into inorganic substances
D. Humification	IV. Dead remains of plants and animals including faecal matter

NEET 2026 Easy

Match List \(-I\) with List \(-II\) :

List \(-I\)	List \(-II\)
\(a\) In lac operon \(i\) gene codes for	\(i\) transacetylase
\(b\) In lac operon \(z\) gene codes for	\(ii\) permease
\(c\) In lac operon \(y\) gene codes for	\(iii\) \(\beta\) - galactosidase
\(d\) In lac operon \(a\) gene codes for	\(iv\) Repressor

Choose the correct answer from the options given below :

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