Photosynthesis and its two stages?

Question

Write the formula for photosynthesis and explain it in detail. Include the two stages: light dependent reaction and light independent reaction.

Answer 1

Photosynthesis occurs in two stages. These stages are called the light reactions and the dark reactions. The light reactions take place in the presence of light. The dark reactions do not require direct light, however dark reactions in most plants occur during the day.

Light reactions occur mostly in the thylakoid stacks of the grana. Here, sunlight is converted to chemical energy in the form of ATP (free energy containing molecule) and NADPH (high energy electron carrying molecule). Chlorophyll absorbs light energy and starts a chain of steps that result in the production of ATP, NADPH, and oxygen (through the splitting of water). Oxygen is released through the stomata. Both ATP and NADPH are used in the dark reactions to produce sugar.

Dark reactions occur in the stroma. Carbon dioxide is converted to sugar using ATP and NADPH. This process is known as carbon fixation or the Calvin cycle. Carbon dioxide is combined with a 5-carbon sugar creating a 6-carbon sugar. The 6-carbon sugar is eventually broken-down into two molecules, glucose and fructose. These two molecules make sucrose or sugar.

Hope This Helps

Answer 2

the formula 4 photosynthesis is:

6 CO2 + 12 H2O ------- C6H12O6 + 6 H2O + 6 O2

(6 carbon dioxide + 12 water YEILDS glucose + 6 water + 6 oxygen)

Light Reaction: needs light to take place

                     : takes place in the grana (where chlorophyll is stored)

-Photolysis=water (H2O) splits into H2 and O

  -the O goes into the air while the H2 is brought by NADP (coenzyme) to the dark reaction

Dark Reaction: does NOT need light to take place

H2 + CO2 ------ PGAL -------- C6H12O6 + H2O

(Hydrogen from the split water molecule + carbon dioxide YIELDS PGAL which then splits into glucose +water)

Answer 3

If you don't know this basis of Biology, or can't even open a textbook and look, I don't think you're allowed on the internet.