Photosynthesis, Respiration & Photorespiration 10/21

Photosynthesis

Sugar production by the conversion of light energy to chemical energy

Photosynthesis 2 step process

Light reactions and Calvin Cycle

Light reactions

converting light energy into chemical energy

Calvin Cycle

-using chemical energy to produce sugar

-A cycle of chemical reactions that converts the C of CO2 into a form the plant can use

Where do light reactions happen?

thylakoids

Light (gets accepted)

-A type of energy

-Absorbed by pigments to proteins and other compounds

-Require PAR and pigments

-chlorophyll and coratenoids

After energy is absorbed

energy is passed from pigments to proteins and other compounds

Results of light reactions

1. Water molecules are split:

-oxygen gets produced

-protons are produced

2. NADPH (chemical energy to get work done) is produced

3. ATP (form of chemical energy) is produced

Calvin cycle requires

-a lot of energy

-ATP

-NADPH

-CO2

-Rubisco

rubisco

-an enzyme

-most used protein

enzyme

 a protein which allows a reaction to occur

importance of rubisco

required to get to the first step of calvin cycle

results of the calvin cycle

-Carbon dioxide can be added to a 5 carbon molecule by Ribisco

-a lot of reaction occur and if it happens enough you get sugar as output

-5 carbon compound can get reproduced