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TLS Online TPP Program

#Question id: 605

Which statement is false about allosteric regulation?

#Biochemistry

  1. It is usually the mode of regulation for the last step in reaction pathways since this step produces the final product.

  2. Cellular response is faster with allosteric control than by controlling enzyme concentration in the cell.

  3. The regulation usually is important to the conservation of energy and materials in cells.

  4. Allosteric modulators bind non-covalently at sites other than the active site and induce conformational changes in the enzyme.

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TLS Online TPP Program

#Question id: 38805

#Plant Biotechnology

Q. Which of the following is a significant drawback of using thermotherapy on whole plants?
TLS Online TPP Program

#Question id: 38806

#Plant Biotechnology

Q. Thermotherapy is noted to be effective against which specific types of pathogens? 
TLS Online TPP Program

#Question id: 38807

#Plant Biotechnology

Q. Why might a plant that survives thermotherapy be at a disadvantage later on?
TLS Online TPP Program

#Question id: 38808

#Plant Biotechnology

Q. Assertion (A):Thermotherapy combined with meristem (shoot-tip) culture is more effective than either method alone for eliminating certain plant viruses.

Reason (R): Some viruses such as Potato virus S (PVS) and Potato virus X (PVX) can only be eliminated when heat treatment is followed by shoot-tip culture, and larger shoot tips taken from heat-treated plants show better survival.

Choose the correct option:
TLS Online TPP Program

#Question id: 38809

#Plant Biotechnology

Q. Assertion (A): Prolonged cold treatment followed by shoot-tip culture can successfully eliminate plant viruses.

Reason (R):Exposure of chrysanthemum plants to 5°C for several months increased the proportion of virus-free plants for both chrysanthemum stunt virus and chrysanthemum chlorotic mottle virus.
TLS Online TPP Program

#Question id: 38810

#Plant Biotechnology

Q. Assertion (A):Increasing the duration of cryotherapy improves virus elimination efficiency.

Reason (R):Extending cold treatment at 5°C from 4 months to 9.5 months increased virus-free frequencies for both CSV and CCMV.