Question

Which kind of reactions occurs in grana and stroma of chloroplast (or) which life process occurs in the green colour plastid?

Answer 1

Answer:

the green colour plastid is chloroplast. photosynthesis is the life process that occurs in chloroplast. photosynthesis is the photochemical reaction by which green plants prepare their own food using CO2, H2O in the presence of sunlight in chloroplast .

Answer 2

• Photosynthesis is a process by which all gree plants produce food substance (Glucose and Starch) from carbondioxide and water by using light as a source of energy in the chloroplast.

$\boxed{\boxed{6CO_{2} + 12H_{2}O \longrightarrow {} C_{6} H_{12} O_{6} + 6 O_{2} \uparrow + 6H_{2} O}}$

• Photosynthesis mainly occurs in two stages :-

⭐ Photo chemical phase

⭐ Bio synthetic phase

• Photo chemical phase (Light Dependent Reaction) :- It takes place only in the presence of light in grana of chloroplast. During this process light energy is converted into chemical energy.

• The chlorophyll present in the chloroplast gets activated by absorbing light energy.

• This absorbed energy is used to split the water molecule. This reaction is known as photolysis.

$\boxed{\boxed{H_{2}O \longrightarrow H^+ + OH^-}}$

• OH ions through a series of steps produce water and oxygen. Protons and electrons are used to produce ATP & NADPH. ATP & NADPH together called as assimilatory power.

• Bio-synthetic Phase (Light Independent Reaction) :- It occurs in the stroma of chloroplast in which carbon is converted into glucose.

• ATP and NADPH produced in light reaction are used during this reaction.

• RUBP and Enzymes are used for the production of glucose which is finally converted into starch.

$\boxed{ \boxed{ \sf \red{Abbreviations \: needed \: to \: know}}}$

$\sf{RUBP \: = \:Ribulose \: bi phosphate }$

$\sf{ATP \: = \: Adenosine \: Tri \: Phosphate}$

$\sf{NADPH \: = \: Nicotinamide \: Adenine \: Dinucleotide \: Hydrogen \: Phosphate}$