Photosynthesis Photosynthetic organisms are producers Producers Produce their

Photosynthesis

Photosynthetic organisms are producers … Producers Ø Ø Produce their own energy by harvesting sunlight The sunlight is converted into chemical energy in form of sugars (Food) Sugars are made through Photosynthesis….

Chloroplasts Chlorophyll ü ü Pigment in the Chloroplast Found in the palisade mesophyll Converts light energy into Food Absorbs some of the visible light • Visible light looks white, but has different colors: blue, red & green

Chlorophyll Plants ü ü have 2 types of chlorophyll Chlorophyll a Chlorophyll b These 2 types of chlorophyll absorb RED and BLUE wavelength of light. Neither type absorbs green light. Plants are green because green light is reflected back into the environment… giving them a green appearance!

What is the role of Chlorophyll in Photosynthesis? Chlorophyll a and b absorb the red and blue sunlight, harvesting the Energy for Photosynthesis https: //www. youtube. com/watch? v=4 CK 4 z 4 MDXu. E

Chloroplasts Place of Photosynthesis (Sun energy -> Food)

Chloroplasts are plant cell organelles. Two main parts of chloroplasts are needed for photosynthesis: Ø Granum (Plural: Grana) Stacks of compartments (Thylakoid) ü Thylakoids are stacked like coins ü Thylakoids contain chlorophyll a & b ü Ø Stroma Fluid in chloroplast ü Grana float in stroma ü https: //www. youtube. com/watc h? v=J 96 HCQa. Agag

2 stages of Photosynthesis Light-dependent v Sunlight is needed Light v –independent No light is needed

Light – dependent reaction Captures energy from the sunlight These reactions happen in the thylakoids

Light- dependent reaction The sun energy is transferred to an energy molecule called ATP. During this process: 1. 2. 3. water (H 2 O) are broken down oxygen (O 2) are produced and Energy (ATP) is made 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2

Photosynthesis

Light- independent reaction Uses the ATP (energy) from the light – dependent reaction to make sugars. v The light-independent reaction (Calvin Cycle ) occurs in the Stroma. v During this process: 1. 2. Carbon dioxide (CO 2) & ATP are used to build sugar (C 6 H 12 O 6) 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2

Photosynthesis 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2