Match the growth phase in Column A with its correct characteristic in Column B.

Column A (Phase)	Column B (Characteristic)
1. Lag Phase	A. Exponential decrease in the number of living cells.
2. Log Phase	B. Adaptation to new environment; synthesis of enzymes.
3. Stationary Phase	C. Nutrient depletion leads to equal rates of growth and death.
4. Death Phase	D. Uniform and rapid cell division; population doubles.

TLS Online TPP Program

#Question id: 38778

#Plant Biotechnology

Q. Statement I: Mannitol and sorbitol are preferred osmotic stabilizers during protoplast isolation.

Statement II: These compounds are metabolized rapidly by protoplasts to generate energy.

TLS Online TPP Program

#Question id: 38779

#Plant Biotechnology

Q. Assertion (A): Vegetatively propagated crops are more prone to rapid spread of viral diseases.

Reason (R): Vegetative propagules directly transmit virus particles from the infected parent plant.

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TLS Online TPP Program

#Question id: 38780

#Plant Biotechnology

Q. Statement I: Sexual reproduction generally limits virus transmission in plants.

Statement II: Many plant viruses are now known to be seed-transmissible.

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TLS Online TPP Program

#Question id: 38781

#Plant Biotechnology

Q. Assertion (A): Shoot apical meristems are preferred explants for eliminating plant viruses.

Reason (R): Viruses are unable to replicate efficiently in rapidly dividing meristematic cells.

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TLS Online TPP Program

#Question id: 38782

#Plant Biotechnology

Q.Statement I: Meristem culture is widely used to recover virus-free plants.

Statement II: Viral titres are usually very low or absent in shoot apical meristems.

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TLS Online TPP Program

#Question id: 38783

#Plant Biotechnology

Q. Assertion (A): Meristem culture has been extensively used in crops like potato and sugarcane.

Reason (R): These crops are clonally propagated and highly susceptible to viral infections.

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