Cellular Respiration and Photosynthesis

ACQUIRING ENERGY

• Photosynthesis (plants)
• Cellular Respiration (both plants

and animals)

PHOTOSYNTHESIS

• Photo=?

– Light

• Synthesis=?

– Put together

• Photosynthesis=?

– Put together with light

• Photosynthesis is the process of converting

light energy to chemical energy and storing it
in the bonds of sugar.

What is required for photosynthesis to occur?

What is required for photosynthesis to occur?

(Reactants)

• Chloroplasts

• Sunlight

• CO2 – Carbon dioxide

• H2O - Water

Where does photosynthesis occur?

The process of photosynthesis takes place in the

chloroplasts, specifically using chlorophyll, the
green pigment involved in photosynthesis.

Chlorophyll
• CHLOROPHYLL — green

pigment found in green
plants. (Chlorophyll is what
makes green plants green)

• Chlorophyll has the ability to

trap the sun's energy, and
use it to rearrange those
carbon dioxide and water
molecules into the glucose.

• Only chlorophyll can do this.

No chlorophyll would mean
no photosynthesis.

What is produced by photosynthesis?

(Products)

•O2 - Oxygen
•C6H12O6 - Glucose

Photosynthesis Equation

6CO2 + 6H2O

C6H12O6 + 6O2

Carbon
Dioxide

Water

Glucose Oxygen

Light

What is cellular respiration?

Cell respiration
is the process
where nutrients
(glucose) are
broken apart
and ENERGY is
released.

Where does cellular respiration occur?

• In many organisms, cell respiration occurs in the

mitochondria.

What does the mitochondria do?

How does cell respiration work?

• Cells capture a lot of the energy that is

released from the glucose chemical
bonds.

• This captured energy is used to form

ATP.

• Adenosine Triphosphate

•ATP is stored chemical energy.

• The energy is stored in the in
the bonds between the three
phosphates.

What is ATP?

What is the chemical equation for cellular respiration?

C6H12O6+ 6O2 6CO2 + 6H2O

+ energy

What do you notice about this chemical

formula?

Glucose

Oxygen

Carbon
dioxide

water

Why
we eat

Why

we breathe

What do you notice about this chemical

formula?

• The chemical equation for photosynthesis and cell

respiration are opposites!

• Photosynthesis

– Needs energy + carbon dioxide + water
– Produces oxygen + glucose

• Cell respiration

– Needs glucose + oxygen
– Produces carbon dioxide + water + energy.

When does cell respiration occur?

• It can happen at

all times of the
day!

• When does

photosynthesis occur?

What types of cells perform cell respiration?

• All cells!

• What types of cells

perform photosynthesis?

How do Photosynthesis and Cellular

Respiration work together?

•Photosynthesis removes carbon dioxide from the

environment, and respiration puts it back.

•Photosynthesis releases oxygen into the environment, and

Respiration uses that oxygen to release energy from food

•Photosynthesis and Cellular Respiration work together to

keep the balance in the environment between Carbon

Dioxide and Oxygen.

Photosynthesis and Cellular Respiration work

together in a cycle.

http://www.teachertube.com/viewVideo.php?video_id=159339

Let’s put it all together!