Energy in the Cell

How do cells get, use, and transform energy?

Shows the flow/transfer of energy

How important is energy to cells?

• Cells need energy to carry out all functions including…– Metabolism, active transport, cell

division, movement of cilia and flagella

• What are some things that you / your cells need energy for?

Where does all of the energy available to organisms come from?

84,000,000,000,000 watts of power reaches the earth from the sun every day

That is A LOT!!!!

SUN

Shows the flow/transfer of energy

Where do all of these plants get their energy from???

Plants, algae, and some bacteria all use photosynthesis

• What is photosynthesis?

Photosynthesis • Photosynthesis uses the energy of the sun

to build sugar (glucose) from CO2 and Water

• This occurs in the chloroplast

SUNLIGHT

GLUCOSE

Photosynthesis

Sugar (glucose)

SUN

Photosynthesis

So…after plants make their food (glucose), what do they do with it?

• Remember what carbohydrate polymers are made from?

• SUGAR!!!

• Glucose and other simple sugars are used by the plants to build plant parts – Ex: leaves, stem, wood, roots, fruit,

tubers (potatoes)

- Glucose

Glucose

Photosynthesis

SUN

Photosynthesis

Glucose (sugar)

Stored as Plant Parts (tissues)

Cellular Respiration• Cellular respiration is the process of

making energy in the form of ATP from sugar (glucose)

GLUCOSE ATP (ENERGY)

• This occurs in the mitochondria of ALL eukaryotic cells – That means plants and animals!!!

SUN

Photosynthesis

Glucose (sugar)

Stored in Plant Parts (tissues)

Cellular Respiratio

n

ATP (Energy

)

So, how do we get energy from plants

• After we digest the plants (plant tissues Glucose), we use CELLULAR RESPIRATION to make ATP using glucose

SUN

Photosynthesis

Cellular Respiratio

n

Glucose (sugar)

Stored in Plant Parts (tissues)

ATP (Energy

)

Cellular Respiratio

n

ATP (Energy

)

The Photosynthesis Equation

Plants take in water (H2O), Carbon Dioxide (CO2), and Sunlight to build Glucose (C6H12O6), releasing O2 (as a waste product (Oxygen).

______ + _______ +____________ ________ + _________

Reactants (what goes in)

Products (what comes

out)

What are the reactants and the products?

The Photosynthesis Equation

6 H2O + 6 CO2 + Sunlight C6H12O6 + 6 O2

Reactants (what goes in)

Products

(what comes out)

+ + +

The Cellular Respiration Equation

To perform cellular respiration, plants and animals break down glucose (C6H12O6) using Oxygen (O2). This produces water (H2O), Carbon Dioxide (CO2), and ATP (energy)

______ + _______ + ________ + _________ + __________

Reactants (what goes in)

Products (what comes

out)

What are the reactants and the products?

The Cellular Respiration Equation

C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP

Reactants (what goes in)

Products

(what comes out)

+ ++

Cellular Respiration is the Reverse of Photosynthesis

6 H2O + 6 CO2 + Sunlight C6H12O6+ 6 O2

C6H12O6 + 6 O2 6CO2 + 6 H2O + ATP