Photosynthesis

Introduction to
PHOTOSYNTHESIS

What is Photosynthesis

Photosynthesis is the process in which plants and some other organisms use
sunlight to synthesize food (Glucose) from carbon dioxide and water.

This process usually happens in the presence of (chlorophyll).

Multiple Choice

What is glucose?

• Protein

• Sugar

• Fat

• amino acid

Multiple Choice

What is chlorophyll?

• A part of the plant responsible for producing pollen

• A cell that provides plants with carbon dioxide

• A green pigment, responsible for the absorption of light

• A vascular membrane that is responsible in transporting water from the roots

Where is chlorophyll located?

Chlorophyll can be found in
chloroplasts.

The chloroplasts is
comprised of stacks of
thylakoids called granum

The chlorophyll can be
found specifically in the
thylakoids.

Multiple Choice

where can you find chlorophyll?

• In the cell membrane

• In the thylakoids

• In the nucleolus

• In the cytoplasm

photosynthetic organisms

Plants, Algae, and cyanobacteria are all examples of organisms that
are photosynthetic. This means they all synthesize carbon dioxide
and water using light energy in order to produce glucose and oxygen

Multiple Select

Which organisms can photosynthesize?

• fungi

• pine tree

• parasitic plant

• algae

Requirements for Photosynthesis

Responsible for capturing

light energy and converting

it into chemical energy.

SUN

Provides light energy for
the plants/organisms to absorn and tunn into chemical energy

WATER
Water is required for a
plant/organism to go
through photosynthesis

CHLOROPHYLL

GASES

Carbon dioxide is

required for a

plant/organism to go

through photosynthesis

DAY VS NIGHT PROCESS

PHOTOSYNTHESIS DURING THE DAY

PHOTOSYNTHESIS AT NIGHT

Photosynthesis does not occur at

night.

Photosynthesis happens at all times
when plants are exposed to the sun.

Multiple Choice

Where do plants get the energy needed to photosynthesize?

• The Rain

• The Moon

• The Wind

• The Sun

Open Ended

Marimo is a type algae grow into large green balls with a velvety appearance. These algae float during the day and sink at night.

Using what you know about photosynthesis why might these balls of algae float during the day but sink at night?

Multiple Choice

What do plants need to make food

• water & carbon monoxide

• water & soil

• water & carbon dioxide

• Water and oxygen

Multiple Choice

What are the end products of photosynthesis?

• Sugar and carbohydrates

• water and oxygen

• Sugar and oxygen

• creatine and oxygen

How do gasses enter and
leave the plants

Gasses enter and leave the
leaves of a plant through
small “Gates” called
stomata

Stomata

Stomata regulate gas exchange

between the plant and environment

and control of water loss by

changing the size of the stomatal

pore

Multiple Choice

How does the stoma regulate gas exchange between the

plant and environment and control of water loss?

• By changing the size of the stomal pore

• By shutting down biological processes in the plant

• By changing the concentration of water outside the plant

• by picking up water from the ground

How does temperature affect photosynthesis?

Increasing Temperature

Decreasing temperature

As temperature increases the
number of collisions decreases
between enzymes and substrate

As temperature increases the
number of collisions increases
between enzymes and substrate

Open Ended

What do you think would happen if the temperature went up too high?

Photosynthesis Formula

6CO2 + 6H2O → C6H12O6 + 6O2

Multiple Choice

What are the elements In the photosynthesis formula?

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

• 6 Carbon Dioxide + 6 Water → 1 Glucose + 6 Oxygen

• 6 Carbon Monoxide + 6 Water → 1 Glucose + 6 Oxygen

• 6 Carbon Dioxide + 6 Water → 1 Amino Acid + 6 Oxygen

• 6 Carbon Dioxide + 6 Hydrogen→ 1 Glucose + 6 Oxygen

Multiple Choice

How many molecules of water are required to produce a molecule of glucose?

• 1

• 6

• 12

• 3

Open Ended

Why would the mouse on the top die but the mouse on the bottom wouldn't in this experiment?

Light and its relationship
with photosynthesis

Photosynthesis is a light dependant reaction
where the wavelength of light affects the rate of
the reaction

Open Ended

Why might plants not absorb Green light as well as red or blue light?

Open Ended

Would a plant absorb blue or white light better? Why?

Open Ended

In what types of settings would it be good to know what types of light plants absorb best?

Why is it important?

Photosynthesis is an a process that provides
essential oxygen and food for life and animals.

Open Ended

What are some of the potential consequences of disruptions in the photosynthesis process, due to environmental changes?"

Normal CO2
Intake

Critical Thinking?

Enhanced CO2
Intake

Open Ended

Suppose scientists were to genetically modify a plant in order to boost the amount/ rate of the carbon dioxide it could intake during photosynthesis, What would be some of the repercussions?