A cell responds to an external stimulus by increasing the intracellular Ca2+ concentration, releasing IP3 from the membrane, and producing salicylic acid. What kind of cell does this describe?

#Question id: 9599

#Unit 6. System Physiology – Plant

The primary donor of PSI, P700, is a dimer of chlorophyll a molecules, in primary donor chlorophyll, additional chlorophylls molecules such as

#Question id: 10127

#Unit 6. System Physiology – Plant

In higher plants, the multi-subunit protein supercomplex has two complete reaction centers and some antenna complexes. The core of the reaction center consists of two membrane proteins known as D1 and D2, Which contained a multi-subunit protein supercomplexes;

#Question id: 10128

#Unit 6. System Physiology – Plant

PSII also involve in oxidation of water molecules, water is a very stable molecule that’s why  Oxidation of water to form molecular oxygen is very difficult, Many studies have provided a substantial amount of information about the process known;

which of the following are false ?

#Question id: 10129

#Unit 6. System Physiology – Plant

Oxidation of water to form molecular oxygen is very difficult: The photosynthetic oxygen-evolving complex is the only known biochemical system that carries out this reaction which essential cofactor are involved in the water-oxidizing process?

#Question id: 10130

#Unit 6. System Physiology – Plant

manganese (Mn) is an essential cofactor in the water-oxidizing process, and a classic hypothesis in photosynthesis research postulates that Mn ions undergo a series of oxidations—known as S states, This hypothesis has received strong support from a variety of experiments, which of the following techniques detect the manganese ions directly and Analytical experiments indicate that how much Mn ions are associated with each oxygen-evolving complex?

#Question id: 10131

#Unit 6. System Physiology – Plant

The detailed chemical mechanism of the oxidation of water to O2 is not yet well understood, but with structural information shows_one electron carrier, generally identified as Yz, functions between the oxygen-evolving complex and P680 to function in this region, Yz needs to have a very strong tendency to retain its electrons, this species has been identified as;