Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 55652
TLS Online TPP Program

#Question id: 10214

LHCII, one of the membrane-bound antenna pigment proteins, which can be phosphorylated and non-phosphorylated by a specific kinase present in thylakoid membrane. Which of the following statements are NOT TRUE ?

#Unit 6. System Physiology – Plant
  1. A protein kinase that can phosphorylate a specific threonine residue on the surface of LHCII
  2. When LHCII is  phosphorylated, it delivers more energy to PSI while LHCII is not phosphorylated, it delivers more energy to PSII
  3. The kinase is activated when plastoquinone, one of the electron carriers between PSI and PSII, accumulates in the reduced state
  4. Reduced plastoquinone accumulates when PSI is being activated more frequently than PSII
More Questions
TLS Online TPP Program

#Question id: 11992

#Unit 10. Ecological Principles

Which of the following abiotic factors has the greatest influence on the metabolic rates of plants and animals? 
TLS Online TPP Program

#Question id: 12641

#Unit 6. System Physiology – Plant

 Among the diverse components of plant defense arsenals are proteins that interfere with herbivore digestion, Given some defense compound of plants in column I with its given action in column II

Column I

column II

I)  α-amylase inhibitors

a) Antidigestive proteins, block the action of herbivore proteolytic enzymes. After entering the herbivore’s digestive tract, they hinder protein digestion by binding tightly and specifically to the active site of protein-hydrolyzing enzymes such as trypsin and chymotrypsin

II) Lectins

b) block the action of the starch-digesting enzyme

III) proteinase inhibitors

c) A defensive proteins that bind to carbohydrates or carbohydrate-containing proteins. After being ingested by an herbivore, bind to the epithelial cells lining the digestive tract and interfere with nutrient absorption
Correctly match the defence compound withits action on herbivore;
TLS Online TPP Program

#Question id: 10350

#Unit 6. System Physiology – Plant

Ammonium can be assimilated via an alternative pathway rather than primary pathway which involves the sequential actions of glutamine synthetase(GS) and glutamate synthase(GOGAT), these alternative pathway catalyzes by enzyme known as,
TLS Online TPP Program

#Question id: 15562

#Unit 12. Applied Biology

Deletion of which gene not only was accompanied by the abolition of antibiotic formation but also severely impaired growth on agar media.
TLS Online TPP Program

#Question id: 12376

#Unit 10. Ecological Principles

All of the following may be considered as sites for secondary succession EXCEPT