Chapter 8: Photosynthesis
1. Describe the roll of ATP in
cellular activities
2. Explain where plants get the
energy they need to produce
food.
3. Explain the roll of light and pigments in
photosynthesis
4. State the overall equation for photosynthesis
5. Describe light and dark reactions
A. Adenosine Triphosphate (ATP)
The ability to do work: __________
ENERGY
THE SUN
Almost all life on earth gets energy from ________
Cells use and store energy two ways:
FATS AND SUGARS
1. Long term storage: __________________
ATP
2. Short term use: _____
3. ATP is not a good way to ________
STORE energy;
cells make just enough to ____.
USE
A. Adenosine Triphosphate (ATP)
Adenine
3 phosphate groups
Ribose
ATP is made from ______.
FOOD
GLUCOSE
One main food of plants and animals is _________
Photosynthesis is the process of using the sun’s
GLUCOSE
energy to produce __________
B. How organisms get their food.
____________ - Organisms that can make their
AUTOTROPHS
own food, usually from sunlight
- Green plants
______________
HETEROTROPHS - Organisms that can not make
their own food, usually ingest it.
- Animals, fungus, protozoans
Auto –
Self
Hetero – Other or different
Troph - nourishment
C. Leaf Anatomy
Cuticle
Epidermis
Mesophyll Cells
Photosynthesis
here
Vein
Stoma
O2, CO2
exchanged here
D. The Chloroplast
______________
CHLOROPLAST Organelle site of photosynthesis
reactions in plant cells.
____________
CHLOROPHYLL pigment in plants that captures the
sunlight and helps turn it into chemical energy.
D. The Chloroplast
__________
THYLAKOID Structure in chloroplast for photosynthesis
__________
GRANUM Stack of thylakoids (grana plural)
D. Photosynthesis
Chlorophyll absorbs _____
RED and ______
BLUE light
Reflects ______
GREEN light
Photosynthesis has two stages:
1. Light Reactions
- Absorbs the energy from sunlight to drive stage two.
- Uses water and gives off oxygen
2. Calvin Cycle (dark reactions = light independent)
- Uses CO2 to make carbohydrates, the food
used by plants
D. Photosynthesis
Used in Calvin Cycle
Made in Calvin Cycle
CO2 + H2O  C6H12O6 + O2
Used in Light Reactions
Made in Light Reactions
CARBON DIOXIDE
CO2 = ________________
WATER
H2O = ______________
CARBOHYDRATES (GLUCOSE)
C6H12O6 = ________________________
OXYGEN
O2 = _______________
D. Photosynthesis