Photosynthesis Ban

G.S.S.S. BANUR Distt. PATIALA State PUNJAB Students Gurpreet Singh Sukhvir Singh Satwinder Kaur Harpreet Kaur

Class 10th 10th 10th 10th Helped By :Amarjit Kaur (Sci. Mistress) Aarti Singla (C.F.) Paramjeet Kaur (C.T.) Sukhwinder Kaur (C.T.)

INDEX • Elements used for making food • Equation for photosynthesis • Photosynthesis pigment • Chloroplast • Raw material for photosynthesis • Factors effecting the photosynthesis • Process of photosynthesis

Photosynthesis DEFINITION : Process of using energy in sunlight to convert water and carbon dioxide into oxygen and glucose is called photosynthesis.

Elements used for making food :1.

Chlorophyll

2.

Water

3.

Light of sun

Equation of Photosynthesis:Sun light 6CO2+ 12H2O Carbon dioxide chlorophyll

In photosynthesis (i)

Producers are plants

(ii)

Production is glucose

C6H12O6 + Glucose

6H2O + 6O2 Water Oxygen

(a) Photosynthesis pigment – Chlorophyll is a green pigment present in green plants.

(b) It is present in green leaves chloroplast Site of photosynthesis- Chloroplast:-

(1)

Chloroplast is in excess in leaves

(2)

Inside a chloroplast there is matrix made from protein, called Stoma .

© Raw material for photosynthesis 1.

Carbondiixide (CO2)

2.

Water (H2O)

Factors Effecting the Photosynthesis :

Internal Factors

External Factors

Chloroplast

Light

Structure of leaf

CO2

Quantity of Production

H2O Temperature Oxygen

Process of Photosynthesis : Process of Photosynthesis is divided into two stages: • Light Reaction • Dark Reaction

Light Reaction • Light is necessary for it. • Light reacts with pigments in the leaf. • Three changes are happened at the end : –

O2 Released

– ATP Formed –

NADPH2 Formed

Dark Reaction • Light is not necessary for it.

•

It takes place in the stoma of chloroplast

• It reduces the power stored in ATP & NADPH. •

It may be understood by Calvin-Benson Cycle

Refrences:Sci text book 10th class (P.S.E.B.)