Cellular Energy Review: Study your notes, definitions, and flipbook. Use these resources to assist you in
answering the following questions to prepare for your test!
1. Where does most of the energy used by life on Earth come from? (4.2)
2. How are the equations for photosynthesis and cellular respiration related? (4.2 & 4.4)
3. Energy flows from the sun through the living world when what happens? Trace the flow of energy from the
sun onward to answer this question. Include your understanding of autotrophs and heterotrophs. (4.2, 4.4,
vocabulary definitions)
4. What are the reactants in photosynthesis? (4.2)
5. Chemosynthesis is a process through which some organisms use energy from chemicals in their
environment to build sugars in the absence of ____________. (4.1)
6. Heterotrophs are organisms that must…(use your vocabulary definitions to complete this sentence)
7. Why is ATP called a cell’s “energy currency”? (4.1)
8. Many producers obtain the energy they need for metabolism through the process of
_____________________ (4.2)
9. Cells produce ATP most efficiently in the presence of _______________ (4.4)
10. In order for plant cells to produce sugars and ATP they need which two organelles? (4.2 & 4.4)
______________________________________________________________________________
11. The process that takes place in the chloroplast is ________________________ (4.2)
12. Light energy is converted to chemical energy through the process of ______________________ (4.2)
13. When cells break down food molecules in the presence of oxygen, energy is stored in ________ by cellular
respiration (4.4)
14. Because of photosynthesis, the atmosphere is rich in __________ gas (4.2)
15. 6H2O + 6CO2 6H12O6 + 6O2 is the equation for _____________________ (4.2)
16. What is the name for the molecules of green pigment that absorb sunlight during photosynthesis in plants?
(4.2 & vocabulary definitions)
17. What happens to the sugars that are made during photosynthesis? They are used in
________________________________ (4.4)
18. Describe the process of cellular respiration (4.4):
19.
20. Chemical energy stored in food molecules is released through _________________________ (4.4)
21. The name of the process that takes place when organic compounds are broken down in the absence of
oxygen is __________________________ (4.6)
22. List 3 products that fermentation is responsible for (4.6):
23. Before cellular respiration, glucose must be broken down by the process of _________________ (4.4)
24. What are the products of cellular respiration? (4.4)
25. Glycolysis, lactic acid fermentation and alcohol fermentation are examples of ___ processes (4.6).
26. Where does the chemical energy to produce ATP come from? (4.1)
27. Which of the following molecules found in the food we eat is most commonly broken down to make ATP?
(4.1)
28. How many ATP are produced by fermentation? (4.6)
29. Which of the following is the source of energy used in chemosynthesis? (4.1)
30. Which process is best represented by the following chemical equation? (4.4)
sugars + oxygen
carbon dioxide + water
31. What is the term for an organism that makes its own source of chemical energy? (vocabulary definitions)
32. In which process is lactic acid formed when there is not enough oxygen present for cellular respiration to
take place? (4.6)
33. Energy is released from an ATP molecule for cellular processes when it has a phosphate group
_________________ (4.1)
34. What molecule carries chemical energy that cells use for their functions? (4.1)
35. Which end product of fermentation causes the burning feeling in muscles that are working hard? (4.6)