Transcript Energy in A Cell - Bishop Ireton High School

Energy in A
Cell
Why do cells need energy?
 Transport
materials
 Cell division
 Production of proteins
Source of Cell’s Energy
ATP
 Adenosine triphosphate
 Energy is available when
ATP
ADP +P +energy
The energy is in the last phosphate bond

A-P-P~P
A-P-P +P
+ENERGY
Photosynthesis
6CO2 + 6H2O
C6H12O6 +6O2
Photosynthesis
 Plants
use ATP but must store it
 Photosynthesis- process of using the sun’s
energy (light energy) to make glucose
(chemical energy)
 Then the plant takes glucose and makes
complex carbohydrates (stored energy)
2 PHASES

1. Light dependant- chlorophyll

2. Light
converts light energy into chemical
energyPRODUCES ATP ,NADPH and Oxygen
Independent- uses CO2 to
produce glucose
(Also called Calvin Cycle)
What happens when chlorophyll
absorbs light?
 The
electrons in chlorophyll are raised to a
higher energy level.
 These electrons are passed to an electron
carrier molecule: NADP+
 NADP+ becomes NADPH
 ADP is also converted to ATP
 Occurs across the thylakoid membrane
Chloroplast
 Thylakoid
contains pigment
chlorophyll
 Absorbs all colors
of wavelengths
except green