TLS Online TPP Program

#Question id: 11562


The relationship between the insect hormones ecdysteroid and PTTH is an example of ________.

#Zoology
  1. an interaction of the endocrine and nervous systems
  2. competitive inhibition of a hormone receptor
  3. how polypeptide-derived hormones have more widespread effects than steroid hormones
  4. homeostasis maintained by antagonistic hormones
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TLS Online TPP Program

#Question id: 38777

#Plant Biotechnology

Q. Statement I: B5 and MS media are commonly used for culturing isolated protoplasts.
Statement II: These media provide essential macro- and micronutrients required for protoplast survival and division.

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.
Choose the correct option:

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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