Name: ________________________________________________ Date: ______________ Period: ________
Lesson Outline: Cells and Energy
Chapter 2 Lesson 4 iScience
pages 69 – 73
A. Cellular Respiration
1. All _____________________things need energy to survive.
2. ______________________ ________________________is a series of chemical reactions that convert the
energy in food molecules into a usable form of energy called ATP.
3. The first step of cellular respiration, called glycolysis, occurs in the _______________________of all cells.
4. During glycolysis ____________________, a sugar, is broken into smaller molecules.
5. The second step of cellular respiration occurs in the ____________________________of eukaryotic cells.
This step requires ___________________ .
6. During the second step of cellular respiration, the smaller molecules made during ______________________
are broken down. Large amounts of usable energy, called ________________, are produced.
7. _________________and carbon dioxide (CO2) are two waste products that are given off during the
second step of cellular respiration.
B. Fermentation
1. Eukaryotic and prokaryotic cells use fermentation to obtain energy from food when _________________
levels are low.
2. Fermentation occurs in a cell’s ___________________________.
3. Lactic-acid fermentation converts ______________________into ATP and a waste product called lactic acid.
4. Some types of bacteria and yeasts make ATP during ________________________ fermentation.
This process produces _______________________ and CO2.
C. Photosynthesis
1. Plants and some unicellular organisms obtain energy from ____________________ .
2. Photosynthesis is a series of chemical reactions that convert light energy, water, and CO2 into
____________________ and _____________________ .
3. In plants, light energy is absorbed by ______________________such as chlorophyll.
4. The chemical reactions of photosynthesis occur in ___________________ , the organelles in plant cells
that convert light energy into food.
5. Photosynthesis uses CO2 that is released during ______________________ ___________________ to make
food energy and release oxygen.
6. When an organism eats plant material, it takes in ______________energy. An organism’s cells use
_____________________ released during photosynthesis.
D. How are cellular respiration and photosynthesis related?
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Directions: Put the following steps in the correct order from 1 to 7. Then add the information to the flowchart
to show the steps in cellular respiration.
_________Chemical reactions occur in the cell’s cytoplasm.
_________Small molecules enter mitochondria.
_________Carbon dioxide is released from the cell.
_________Water is released from the cell.
_________Small amounts of ATP are released.
_________Sugar molecules enter a cell.
_________Large amounts of ATP are produced.
(6 and 7 are
interchangeable)
Name: ___________________________________________ Date: ______________ Period: ___________
Active Studying Review
Chapter 2 Lesson 4
Pages 69 - 73
1. What does cellular respiration convert? ________________________________________________________
2. In which organelle does respiration take place? ___________________________________
3. What happens during glycolysis? ____________________________________________________________
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4. What three things are produced during the second step of respiration? _______________________________
__________________________________ _______________________________________________
5. How does the process of fermentation differ from the process of respiration? __________________________________
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6. Where can the process of lactic-acid fermentation be found? _____________________ ________________
___________________________________ ______________________________________________
7. What do human and animal cells obtain through lactic-acid fermentation during exercise? _______________________
8. What does alcohol fermentation produce? ________________________ and _______________________
9. What do plant cells use to produce glucose and oxygen? _________________ ____________________ and
____________________ and ______________________
10. What is reflected by a plant to give it a green color? _____________________
_______________________
11. What does an animal take in when it eats a plant? __________________ _____________________
12. Which molecules are involved in photosynthesis and respiration? ____________________
_________________________ __________________________
__________________
13. What is cellular respiration? ________________________________________________________________________
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14. In which two parts of the cell does cellular respiration occur? _______________________________ and
_________________________________
15. How is fermentation similar to cellular respiration? _____________________________________________________
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16. How is fermentation different from cellular respiration? _________________________________________________
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17. What is photosynthesis? ___________________________________________________________________________
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18. Identify the following chemical reactions:
a. 6CO2 + 6H2O → C6H12O6 + 6O2 ______________________________________________________________
b. C6H12O6 → ATP (energy) + lactic acid _________________________________________________________
c. C6H12O6 → 6O2 + 6H2O + ATP (energy) _______________________________________________________
d. C6H12O6 → ATP (energy) + CO2 + alcohol ______________________________________________________
Name: __________________________________________ Date: ______________ Period: ___________
Understanding Check: Cellular Respiration and Photosynthesis
Directions: Complete the table to compare cellular respiration and photosynthesis. Use the information in the completed table
to write a poem, acrostic, limerick, rap or make a crossword puzzle that compares cellular respiration and photosynthesis.
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