Photosynthesis /Cell Respiration Review Questions
Name______________________________
1. What are the 3 parts of an ATP molecule? On the back, draw and label a diagram.
2. Why does an ATP molecule release energy? On the back, draw a graph of the energy change.
3. What are the products of photosynthesis?
4. What are the reactants of cellular respiration?
5. Why are photosynthesis and cellular respiration complimentary processes?
6. Cellular respiration occurs in what organelle?
7. Photosynthesis occurs in what organelle?
8. What are the names of the two steps of photosynthesis?
9. What is the first part of cellular respiration? What are the next two parts?
10. How do animals get the glucose needed for cellular respiration?
11. Which one of the four organic compound groups does glucose belong to?
12. What gases do plants breath in and out?
13. How do those gases get in and out of plants?
14. What gases to animals breath in and out?
15. How do those gases get in and out of animals, and how do those gases get to the site of cellular
respiration?
16. On the back, write the balanced chemical equation for photosynthesis, and the balanced chemical
equation for respiration. Label which one is which. Label the products and the reactants for each.
Photosynthesis /Cell Respiration Review Questions
Name______________________________
1. What are the 3 parts of an ATP molecule? On the back, draw and label a diagram.
3 phosphate groups
Ribose
(5 carbon sugar)
Adenine
(nitrogen base)
2. Why does an ATP molecule release energy? On the back, draw a graph of the energy change.
When ATP breaks apart, ADP and P are formed. All reactions require
energy to get started, but this reaction gives more energy back, thus
we would set the net result is energy released which can be used to
perform cellular funtions. This type of reaction that releases energy
is called an exothermic reaction. An analogy could be made to a
lemonade stand: 5 dollars spent to get started, and 15 dollars made,
so the net result is a 10 dollar profit!
3. What are the products of photosynthesis?
glucose, C6H12O6 and oxygen, O2
4. What are the reactants of cellular respiration?
carbon dioxide, CO2 and water, H2O
5. Why are photosynthesis and cellular respiration complimentary processes?
As you can see in the reactions that you will write for question 16, the products of photosynthesis are the reactants of
cellular respiration, and the products of cell respiration are the reactants of photosynthesis. These two reactions are the
forward and reverse of each other.
6. Cellular respiration occurs in what organelle?
the mitochondria in both animals and plants
7. Photosynthesis occurs in what organelle?
the chloroplasts of plant cells
8. What are the names of the two steps of photosynthesis?
step 1: the light reaction, step 2, the Calvin cycle
9. What is the first part of cellular respiration? What are the next two parts?
step 1: glycolysis, step 2: the Krebs cycle, step 3: the electron transport chain
10. How do animals get the glucose needed for cellular respiration?
animals eat the glucose
11. Which one of the four organic compound groups does glucose belong to?
glucose is a carbohydrate
12. What gases do plants breath in and out?
plants breath out oxygen and breath in carbon dioxide during photosynthesis, however, plants also breath out carbon
dioxide and water vapor and breath in oxygen when performing cell respiration. Overall, plants do breath out more xoygen
than they breath in.
Photosynthesis /Cell Respiration Review Questions
Name______________________________
1. How do those gases get in and out of plants?
gases come and go throughout the stomata
2. What gases to animals breath in and out?
animals breath in oxygen and breath out carbon dioxide
3. How do those gases get in and out of animals, and how do those gases get to the site of cellular
respiration?
gases get in and out of animals though the lungs travelling to and from cells
via the red blood cells in the blood vessels
4. On the back, write the balanced chemical equation for photosynthesis, and the balanced chemical
equation for respiration. Label which one is which. Label the products and the reactants for each.
Photosynthesis: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
Cellular Respiration: C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
Products are what is formed, the chemicals on the right side of the arrow.
Reactants is what is used (started with) on the left side of the arrow.