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: __________

Almost all life on earth gets energy from ________

Cells use and store energy two ways:

1. Long term storage: __________________

2. Short term use: _____

3. ATP is not a good way to ________ energy; cells make just enough to ____.

ENERGY

THE SUN

FATS AND SUGARS

ATP

STOREUSE

A. Adenosine Triphosphate (ATP)

ATP is made from ______.

One main food of plants and animals is _________

Adenine

Ribose

3 phosphate groups

Photosynthesis is the process of using the sun’s energy to produce __________

FOOD

GLUCOSE

GLUCOSE

B. How organisms get their food.

____________ - Organisms that can make theirown food, usually from sunlightAUTOTROPHS

______________ - Organisms that can not make their own food, usually ingest it.HETEROTROPHS

- Green plants

- Animals, fungus, protozoans

Auto – Hetero –Troph -

SelfOther or differentnourishment

C. Leaf Anatomy

CuticleEpidermis

Mesophyll Cells

Vein

Photosynthesishere

StomaO2, CO2

exchanged here

D. The Chloroplast

______________ Organelle site of photosynthesisreactions in plant cells.CHLOROPLAST

____________ pigment in plants that captures thesunlight and helps turn it into chemical energy.CHLOROPHYLL

D. The Chloroplast

__________ Structure in chloroplast for photosynthesis

__________ Stack of thylakoids (grana plural)

THYLAKOID

GRANUM

D. Photosynthesis

Chlorophyll absorbs _____ and ______ light

Reflects ______ light

RED BLUE

GREEN

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

CO2 + H2O C6H12O6 + O2

Used in Calvin Cycle

Used in Light Reactions

Made in Calvin Cycle

Made in Light Reactions

CO2 = ________________

H2O = ______________

C6H12O6 = ________________________

O2 = _______________

CARBON DIOXIDE

WATER

CARBOHYDRATES (GLUCOSE)

OXYGEN

D. Photosynthesis