Transplantation of different regions of the presomitic mesoderm (PSM) to the limb field causes changes in limb size. Following statements are:

A. Transplanting PSM from the level of the presumptive forelimb to the flank (region between the forelimb and hindlimb) results in a larger forelimb bud.

B. Transplantation of PSM from the flank region to the level of the presumptive forelimb results in a smaller forelimb bud.

C. Transplanting PSM from the level of the presumptive forelimb to the flank (region between the forelimb and hindlimb) results in a smaller forelimb bud.

D. Transplantation of PSM from the flank region to the level of the presumptive forelimb results in a larger forelimb bud.

Which of the following combination are correct?

#Question id: 10218

#Unit 6. System Physiology – Plant

An effect that appears to be a major factor in the stability of the photosynthetic apparatus is photoinhibition, which occurs when excess excitation arriving at the PSII reaction center leads to its inactivation and damage due to

#Question id: 10219

#Unit 6. System Physiology – Plant

The PSII reaction center leads to easily  inactivation and damage by photoinhibition process while Photosystem I Is Protected from Active Oxygen Species, Why PSI protect from active oxygen species in compare to PSII

#Question id: 10220

#Unit 6. System Physiology – Plant

Thylakoid membranes contain a protein kinase that can phosphorylate a specific threonine residue on the surface of LHCII. How the kinase is activated?

#Question id: 10221

#Unit 6. System Physiology – Plant

plastoquinone is one of the electron carriers between PSI and PSII, accumulates in the reduced state. Reduced plastoquinone accumulates when

a.) PSI is being activated more frequently than PSII

b.) PSII is being activated more frequently than PSI  

c.) LHCII is not phophorylated

d.) LHCII is phophorylated

Which of the following state will correct?

#Question id: 10222

#Unit 6. System Physiology – Plant

Energy partitioning between two photosystem protects them from quick dessipation or quick inactivation this energy partitioning take place by a protein kinase that can phosphorylate a specific threonine residue on the surface of LHCII, what is the role of LHCII in phosphorylated and non-phosphorylated state?

a.) LHCII in phosphorylated state migrate towards the PSI in the unstacked region and delivers energy to the PSI 

b.) LHCII in nonphosphorylated state moves back to the grana and delivers energy to the PSII

c.) LHCII in phosphorylated state migrate towards the PSII in the stacked region and delivers energy to the PSI 

d.)  LHCII in nonphosphorylated state moves towards the stroma lamellae unstacked region and delivers energy to the PSII 

Which of the following combination is CORRECT?

#Question id: 10223

#Unit 6. System Physiology – Plant

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?