Name: _____________________
Cellular Energy- Photosynthesis
The Sun
I. The ____________is the ultimate source of all energy needed to fuel the chemical
activities of cells. Most food chains begin with the process of photosynthesis
II.______________________________ – Process that converts the sun’s energy into
sugars for plant cells.
 plants and algae are producers (or autotrophs) which means they use
energy from the sun to create food
II. Photosynthesis
A. All cells use ___________ energy. Chemical energy is the energy stored in the bonds
between atoms of every molecule
B. Plants convert light energy from the sun into chemical energy by creating molecules of
__________.
C. Plants use some of the chemical energy (glucose) they create to make ___________
(energy) for their own cells
D. The rest of the chemical energy (glucose) is _______ in the plant’s tissues and is eaten
by consumers
E. The cells of organisms must be able to _________ the chemical energy that is stored in
the bonds of glucose
________ ___________- Shows energy lost as you move up a food chain
Flow of energy
and the loss as you move up
the food chain
Review it
In the space provided, explain in your own words why the sun is the ultimate source of all
energy on earth.
1. All food chains begin with
a. Decomposer
c. Producer
b. Consumer
d. Herbivore
How does this begin?
A.________________________ - organelle that performs photosynthesis reaction
B. ________________________- molecules in the chloroplast that absorb sunlight
1.______________________ – green; main pigment
2.__________________- yellow to orange; extra pigments that are
responsible fall colors
Photosynthesis Reaction
6CO + 6H2O + light 
(Carbondioxide + water + light)

Name: _____________________
C6H12O6 +
6O2
Glucose
+ Oxygen)
1. What do plants and algae take in to carry out photosynthesis?
2.What do plants and algae produce during the process of photosynthesis?
3. In which organelle does the process of photosynthesis occur in?
Chromatography lab
1. Describe the importance of the 3 types of pigments found in plants.
Anthocyanins –
Carotenoids and chlorophyll –
2. Why are pigments important in the process of photosynthesis?
3. What is the name of the primary pigments of photosynthesis?
4. What color are the primary pigments of photosynthesis?
5. What is the name of the accessory pigments of photosynthesis that are visible in the fall and winter
months of the year?
6. What color are these accessory pigments?
7. What does the word “chromatography” mean?
8. What organelle is responsible for the process of photosynthesis in plants?
9. What are the products of photosynthesis? (Hint: what do plants make during photosynthesis?)
10. What are the reactants of photosynthesis? (Hint: what do plants use during photosynthesis?)
Name: _____________________
Cellular Energy Part 2- Cellular Respiration
Review before we begin 1. What do plants and algae take in to carry out photosynthesis?
2. What do plants and algae produce during the process of photosynthesis?
3. In what organelle does photosynthesis take place?
Releasing Energy
I.___________________– process that allows organisms to release energy from
stored food.
A. ___________________________ – organelle that performs cellular
respiration.
B. Cellular respiration reaction =
C6H12O6 + 6O2 
6CO2
+ 6H2O + ATP
Glucose + oxygen  carbon dioxide + water + energy
Cellular Respiration takes place in the ___________________
1. What do cells take in during the process of cellular respiration?
2. What do cells produce during the process of cellular respiration?
3.In which organelle does cellular respiration take place?
The big picture
4. How does the mitochondria and the chloroplast work together and depend on one
another? (Use the diagram above to help you answer this question)
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
Name: _____________________
II.______________________ – getting energy from food without oxygen – occurs
in the cytoplasm of the cell
What if oxygen is
unavailable?
We still need energy!
A. Two types- Lactic Acid fermentation and alcoholic fermentation
1._________________ - produces alcohol; Bacteria and yeast break down sugar and
release alcohol as waste. Used to make bread, yogurt, cheese, pickles, beer, and
wine. Fermentation is what gives some foods their unique flavor.
2. __________________ - Produce lactic acid; Runners Burn  muscle cells that
don’t get enough oxygen switch to fermentation in order to get energy; lactic acid
builds up and causes burning sensation
Review it!
1.Why do human cells switch from cellular respiration to fermentation?
2. Describe a situation that has caused your cells to switch from cellular
respiration to fermentation.
3. Where does fermentation occur within the cell?
Plant Cell
Label where each process occurs in each of the cells
Animal Cell