KCET · BIOLOGY · STD 12 - 10. Biotechnology and Its Applications

During somatic hybridisation in plants

A the cell walls and the middle lamella are digested before fusing the cells
B somaclones are produced in large numbers
C crop plants with higher levels of vitamins, proteins and minerals are hybridised
D the apical meristems are cultured to get virus-free plants

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Answer & Solution

Correct Answer

(A) the cell walls and the middle lamella are digested before fusing the cells

Step-by-step Solution

Detailed explanation

(A) the cell walls and the middle lamella are digested before fusing the cells,
During somatic hybridisation in plants the cell walls and the middle lamella are digested before fusing the cells.

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.

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Column I (Plant groups)	Column II (Examples)
1. Bryophyta	p. Pinus
2 Gymnosperm	q. Adiantum
3. Algae	r. Sphagnum
4. Pteridophyta	s. Ectocarpus