Name: ________________________________________________________________ Period: ________ Date: _______
Reading Guide for Chapter 3.4: Photosynthesis and Respiration
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What is Respiration?
1. What happens during respiration? ___________________________________________________________
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2. How is respiration different from breathing? ___________________________________________________
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3. In the first stage of respiration, respiration takes place in the cytoplasm of the organism’s cells. Molecules of
_____________________ are broken down into smaller molecules.
4. During the second stage of respiration, respiration takes place in the _____________________. The molecules of sugar are
broken down into even smaller molecules. When this chemical reaction takes place ___________________ is released.
5. Use the table below to list the reactants and products of respiration.
Respiration
Reactants (starting substances)
1.
2.
Products (resulting substances)
1.
2.
3. Energy the cell can use**
** Energy is not technically a product (because products refer to matter only), but it is an important result of
respiration.
6. Use the table below to list the reactants and products of photosynthesis.
Photosynthesis
Reactants (starting substances)
1.
2.
3. Energy in sunlight**
Products (resulting substances)
1.
2.
** Energy is not technically a reactant (because reactants refer to matter only), but it is needed for
photosynthesis to occur.
7. Compare the reactants of photosynthesis with the products of respiration. What do you notice?
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8. Compare the products of photosynthesis with the reactants of respiration. What do you notice?
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9. Complete the table below.
Organelle
Present in plants or
animals or both?
Does photosynthesis or
respiration occur in this
organelle?
Mitochondria
Chloroplast
10. Describe the cycle of matter that occurs during photosynthesis and respiration.
(This answer should be a specific and detailed explanation. Your answer can be written as a paragraph or as
numbered steps. Your answer should include the following words: photosynthesis, respiration, carbon dioxide,
water, oxygen, glucose, substances and/or matter, transform, atoms, rearrange, cycle. Words can be used more
than once.)
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11. Why is it called a cycle of matter? __________________________________________________________
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12. Describe the flow of energy that occurs during photosynthesis and respiration.
(This answer should be a specific and detailed explanation. Your answer can be written as a paragraph or as
numbered steps. Your answer should include the following words: photosynthesis, respiration, sunlight,
chemical energy, glucose, energy, transform, flow. Words can be used more than once.)
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13. Why is it called a flow of energy? __________________________________________________________
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