Photosynthesis & Respiration
Pre- Assessment
1.
What types of living things
carry out photosynthesis?
2. In which cell structure does
photosynthesis occur?
Pre-assessment continued
3. What are the substrates for
photosynthesis?
4. What are the products of
photosynthesis?
Continued…
5. What does the term respiration
make you think of?
6.
In which cell structure does
cellular respiration occur?
Wait there’s more…
7. What types of living things
carry out cellular respiration?
8. What are the substrates for
cellular respiration?
Food for thought…
What goes in?
What comes out?
Where does the matter
in the tree come from?
Where does the cow get energy?
What goes in?
What comes
out?
The cow, you (animals) and plants get it from
Glucose : a simple sugar that is a type of
carbohydrate
• Other Simple Sugars are:
Fructose (fruit sugar)
Sucrose/tablesugar=glucose+ fructose
Glucose C6H12O6 : type of carbohydrate
called a simple sugar
• Do you see six carbon atoms?
• Can you describe the shape?
Other Carbohydrates:
• Complex carbohydrates:
• Starch: in bread/pasta
Cellulose: in plant cell walls
Carbohydrate functions:
• Sugars and starches provide short-term energy
storage…
• Cellulose provides structure in plants.
Complex Carbohydrates are
polymers…
Polysaccharides:
• How do
carbohydrate
polymers form?
• Water is
removed from
the 2 molecules
by an enzyme
to form a
covalent bond!
Why do we care about
Photosynthesis?
it is the MOST important chemical
reaction on our planet!
The equation for the chemical reaction
of photosynthesis is:
Sunlight (ENERGY!)
6CO2+6H2O
(Reactants/
Substrates)
C6H12O6 + 6O2
Glucose!
(Products)
• Why do we need 6CO2 +6H2O
rather than CO and H2O?
• To balance the Equation!
• Photosynthesis is a Synthesis
reaction BECAUSE it builds a 6
carbon molecule (glucose) from
single carbon molecules.
Describe Photosynthesis:
-Process that transforms light
energy to chemical energy
-The chemical energy is stored in
sugar (GLUCOSE)
-Occurs in plants, algae & some
bacteria
Describe Photosynthesis, cont.
-Takes place in chloroplasts
using chlorophyll, the green
pigment in plants
-Chlorophyll uses light energy to
drive the reaction
What happens during photosynthesis?
Plants capture light energy and use it to
convert CO2 and H2O to glucose
(C6H12O6) and oxygen (O2)
Glucose is stored, but Oxygen is released
into the air
Photosynthesis, cont.
The glucose is moved from the leaves to the
roots, stems and fruits of the plants
Some of the sugar is used by the plant for
energy
Some is stored as starch and/or built into
plant tissue
The RESULT of Photosynthesis!
The energy that was in sunlight
was transformed (changed) into
chemical energy (now in
glucose) by photosynthesis!!
CO2 has been converted to
MATTER that we can use as a
source of Carbon!
Where is the energy stored in the
Glucose molecule (C6H12O6)?
• In the BONDS between the
Atoms
Why is this important to us?
Reason 1:
We cannot make our own food; we
must get it from plants.
Plants are the first step in the food
chain.
Why is this important to us?
Reason 2:
The oxygen released during
photosynthesis is necessary for
all living things.
What is Cellular Respiration?
What is Cellular Respiration?
A chemical reaction that
involves the breakdown of
glucose molecules to
release energy and
transform it into ATP, the
“gasoline” for our cells!
Where does it take place?
Respiration?
It takes place in the mitochondria of
both plant and animal cells (ALL
living things!)
A multi-step process
What are the Substrates &
Products of the Reaction?
• Requires Glucose & Oxygen as
substrates (substances we take
in)!
• Produces Carbon Dioxide &
Water (the things we breathe
out!) as products.
What is the chemical equation for
cellular respiration?
Glucose
Oxygen
C6H12O6+ 6O2
6CO2+6H2O +
38 ATP
Video: Photosynthesis and
Cellular Respiration
http://www.teachertube.com/viewVideo.php
?title=Cellular_Respiration_and_Photosynt
hesis&video_id=159339
Photosynthesis Respiration
Where does it
occur?(organelle)
Why is it
important?
What is the
Substrate?
Products?
What is the
formula?
Who does it?
(Plant, Animal)
Your assignment – CHOOSE ONE!
(30 points) CREATE A
CROSSWORD PUZZLE (12 terms)
• COMPARE / CONTRAST POSTER
• 12 QUESTION OBJECTIVE QUIZ
• JEOPARDY GAME (3 categories –
4 levels)
• STUDY GUIDE (concepts, terms,
defs)
Compare/contrast chart:
• Create a chart that Compares and
Contrasts photosynthesis and cellular
respiration.
• For Help: Chapter 4, starting on Page 80
• Include:
•
•
•
•
Organelles (chloroplast/mitochondria)
Balanced equations
Basic information
Why is this important?