Practice Questions

TLS Online TPP Program

#Question id: 10223

when plastoquinone is accumulates in the reduced state, Reduced plastoquinone accumulates when PSII is being activated more frequently than PSI. What will happen when plastoquinone becomes more oxidized?

#Unit 6. System Physiology – Plant

The kinase is deactivated and the level of phosphorylation of LHCII is decreased by the action of a membrane-bound phosphatase
The kinase is activated and then phosphorylate a specific threonine residue on the surface of LHCII
phosphorylation of LHCII is take place and the phosphorylated LHCII then migrates out of the stacked regions of the membrane into the unstacked regions
kinase is deactivated dephophorylation takes place and LHCII moves back to the stroma lamellae away from photosystem II

More Questions

TLS Online TPP Program

#Question id: 13234

#Unit 6. System Physiology – Plant

Some roots can develop positive hydrostatic pressure in their xylem is called

TLS Online TPP Program

#Question id: 13235

#Unit 6. System Physiology – Plant

Few statements regarding water potential of soil

a) The osmotic potential (Ys) of soil water is generally negligible because solute concentrations are low

b) In wet soils the Hydrostatic pressure (Yp) of soil water is close to zero

c) In dry soils the Hydrostatic pressure (Yp) of soil water is negligible

d) ) The osmotic potential (Ys) of soil water is generally positive because solute concentrations are low

Which one of the following combination of above statements is TRUE?

TLS Online TPP Program

#Question id: 13551

#Unit 6. System Physiology – Plant

As water is lost to the air, the surface of the remaining water is drawn into the interstices of the cell wall, where it forms curved air–water interfaces

TLS Online TPP Program

#Question id: 13552

#Unit 6. System Physiology – Plant

Transpiration from the leaf depends on two major factors;

TLS Online TPP Program

#Question id: 13553

#Unit 6. System Physiology – Plant

According this graph which statements is most appropriate ;

a) The air surrounding the leaf is very still, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf

b) The air surrounding the leaf is very still, reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer

c) The moving air reduces the thickness of the boundary layer at the leaf surface, reducing the resistance of this layer

d) The moving air, the layer of unstirred air on the surface of the leaf may be so thick that it is the primary deterrent to water vapor loss from the leaf

TLS Online TPP Program

#Question id: 13554

#Unit 6. System Physiology – Plant

The microscopic stomatal pores provide a pathway for diffusional movement of gases across the epidermis and cuticle