Practice Questions

TLS Online TPP Program

#Question id: 573

How is trypsinogen converted to trypsin?

#Biochemistry

A protein kinase-catalyzed phosphorylation converts trypsinogen to trypsin.
An increase in Ca2+ concentration promotes the conversion.
Proteolysis of trypsinogen forms trypsin.
Trypsinogen dimers bind an allosteric modulator, cAMP, causing dissociation into active trypsin monomers.

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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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TLS Online TPP Program

#Question id: 38784

#Plant Biotechnology

Q. Statement I: Meristem culture was first applied to produce virus-free Dahlia plants.

Statement II: This application was reported by Morel and Martin in 1952.

TLS Online TPP Program

#Question id: 38785

#Plant Biotechnology

Q.Statement I: Very small apical meristems are used for virus elimination in meristem culture.

Statement II: The initial size of apical meristems used is approximately 100 µm.

TLS Online TPP Program

#Question id: 38786

#Plant Biotechnology

Q. Statement I: Meristem culture is used to eliminate only viral pathogens from plants.

Statement II: Plants regenerated through meristem culture are free from viruses, viroids, mycoplasma, fungi, and bacteria.