Photosynthesis Notes
What is Photosynthesis?
It is the process by which plants use sunlight to create
food in the form of sugar/glucose.
Photosynthesis Formula:
Sun Energy
6CO2 + 6H2O C6H12O6 + 6O2
(Carbon dioxide + Water Glucose + Oxygen)
Main Requirements:
➢ Sunlight
➢ Water
➢ Carbon
Products
➢ Energy / Sugar / Glucose
➢ Oxygen (by product)
Three Kingdoms which contains photosynthetic autotrophs:
1. Monera – Cyanobacteria
2. Protista – algae
3. Plantae
Side notes:
(Autotrophs: organisms that can make their own food)
, There are two sets of reaction in Photosynthesis
➢ The light Reaction (Energy Capturing)
➢ The Light Independent reaction (food making)
The light Reaction (Light-dependent Reaction)
What is light dependent reaction?
➢ The capturing of light energy to make two molecules
needed for the succeeding stage of photosynthesis.
➢ It takes place in the thylakoid membrane – pigments
that absorb light.
Photophosphorylation
➢ Using of light energy to make ATP from ADP.
Stages:
1. Light Absorption in Photosystem II
2. ATP Production
3. Formation of NADPH
Light Absorption in Photosystem II
➢ A photosystem absorbs light energy to energized
electrons.
➢ The energized electrons are transferred to the
carrier molecules within the thylakoid.
➢ The electron will be replaced by electron from
water, resulting to splitting of water and releasing of
oxygen.
What is Photosynthesis?
It is the process by which plants use sunlight to create
food in the form of sugar/glucose.
Photosynthesis Formula:
Sun Energy
6CO2 + 6H2O C6H12O6 + 6O2
(Carbon dioxide + Water Glucose + Oxygen)
Main Requirements:
➢ Sunlight
➢ Water
➢ Carbon
Products
➢ Energy / Sugar / Glucose
➢ Oxygen (by product)
Three Kingdoms which contains photosynthetic autotrophs:
1. Monera – Cyanobacteria
2. Protista – algae
3. Plantae
Side notes:
(Autotrophs: organisms that can make their own food)
, There are two sets of reaction in Photosynthesis
➢ The light Reaction (Energy Capturing)
➢ The Light Independent reaction (food making)
The light Reaction (Light-dependent Reaction)
What is light dependent reaction?
➢ The capturing of light energy to make two molecules
needed for the succeeding stage of photosynthesis.
➢ It takes place in the thylakoid membrane – pigments
that absorb light.
Photophosphorylation
➢ Using of light energy to make ATP from ADP.
Stages:
1. Light Absorption in Photosystem II
2. ATP Production
3. Formation of NADPH
Light Absorption in Photosystem II
➢ A photosystem absorbs light energy to energized
electrons.
➢ The energized electrons are transferred to the
carrier molecules within the thylakoid.
➢ The electron will be replaced by electron from
water, resulting to splitting of water and releasing of
oxygen.
