This presentation is on the topic of photosynthesis. Photosynthesis is the process by which plants use sunlight, carbon dioxide, and water to create glucose (sugar) and release oxygen. Leaves contain a pigment called chlorophyll that captures sunlight. This energy is used to convert carbon dioxide and water into glucose, which serves as food for the plant, while oxygen is released back into the air.

2. o The process by which living plant cells containing chlorophyll produce
organic food substance from carbon dioxide and water by using light
energy and releasing Oxygen as by-product.
6CO2 + 12H2O C6H12O6 + 6H2
Chlorophyll
6CO2 + 12H2O C6H12O6 + 6H2O + 6O2
RAW MATERIALS-
1. Water from soil
2. Carbon dioxide from air
3. Sunlight
4. Chlorophyll present in chloroplast
SSunlight

4. Outer
membrane
Inner
membrane fret
granum
thylakoid
stroma
Location- In the cytoplasm of
cells of leaves
• 20 to 40 chloroplasts in each
plant cell
• Double membranous
• Thylakoids forming grana
present in stroma, connected
by frets
• Pigment chlorophyll present
in thylakoids of chloroplast
• Chlorophyll contains
Magnesium and traps solar
energy for photosynthesis

5. Aorta
Pulmonary artery
Pulmonary veins
Left Auricle
Pulmonary semilunar
valve
Bicuspid valve
Left Ventricle
Interventricular
septum
Inferior
vena cava
Right
Ventricle
Tricuspid valve
Right
Auricle
Pulmonary
veins
Superior
vena cava
Aortic semilunar valve

6. Potassium ion concentration theory
During daytime the ATP produced
during photosynthesis actively pumps
the K ions into the guard cells thereby
increasing its tonicity due to which
water enters and the cells become
turgid thus opening the pore
Sugar concentration theory
During daytime guard cells
photosynthesize and lead to
accumulation of glucose in the
cells . The cells become hypertonic
thus drawing in more water ,
which makes the cells turgid and
thus opening the pore

7. Two main phases of photosynthesis-
- LIGHT DEPENDENT PHASE OR
PHOTOCHEMICAL PHASE
1. Chlorophyll absorbs the solar energy
2. Photolysis of water
3. Production of reducing agent NADPH
4. Production of molecular Oxygen
5. Photophosphorylation
- LIGHT INDEPENDENT PHASE OR
BIOSYNTHETIC PHASE
2

8. The glucose molecules undergo
Polymerisation to produce Starch which
is stored in the plants
ARTERY VEIN
Photochemical Phase Biosynthetic Phase
glucose