Name ___________________________________________________________
Biology I
Hour ______
Date ______
1. How do plants store energy from the sun? Write the steps below.
2. How do animals use the sun's energy that is stored in plants? Write the steps below.
3. Which molecules store energy in both plants and animals? __________________________________
4. How is ATP formed?
5. Where is the energy stored in an ATP molecule?
6. How does ATP give energy to the cell?
7. What is left after an ATP molecule loses a phosphate molecule?
Part 2 - Matching
a. ADP
b. aerobic process
c. anaerobic process
d. ATP
e. chemosynthesis
f. electron transport chain
g. photosynthesis
h. respiration
____ 1. breaking down energy from food molecules
____ 2. biological process that needs oxygen
____ 3. ATP without the third phosphate group
____ 4. series of molecules that move electrons transferring their energy to atp
____ 5. biological process that captures energy without the sun
____ 6. biological process that does not need oxygen
____ 7. biological process that uses energy from the sun
____ 8. energy-storing molecules
Part 3 - If the term goes with photosynthesis, write it in the table under Photosynthesis. If the term goes with aerobic
respiration, write the term under Aerobic Respiration, etc. Some terms may go under more than one heading.
Kreb cycle
lactic acid fermentation
Photosynthesis
alcoholic fermentation
glycolysis
Aerobic Respiration
Calvin cycle
light reaction
Anaerobic Respiration
Part 4 - Complete each statement.
1. The reactions in photosynthesis in which energy from the sun is converted to chemical energy are called
2. The process by which autotrophs use energy from sunlight to build carbohydrates is called
3. The passing of electrons along a series of molecules, releasing energy as they go, is known as a(n)
4. The process by which organisms obtain energy from inorganic compounds instead of from light is
5. The anaerobic process of splitting glucose to form pyruvic acid is called
6. In photosynthesis, the series of reactions that synthesize simple sugars from carbon dioxide and hydrogen is known
as
____________________ and the compound formed is the _____________________ .
Compare and contrast each pair of related terms.
7. aerobic process : anaerobic process
8. photosvnthesis : respiration
Part 5
1. Where do autotrophs get energy to produce food?
2. How do living things use ATP?
3. How is one molecule of ATP formed from one molecule of ADP?
4. How does a change from ATP to ADP provide an organism with energy?
5. What are two ways in which cells use the energy provided by ATP?
6. What are the similarities between autotrophs and heterotrophs? What are the differences?
2
Examine the diagram below and then answer the following questions.
Energy from Food
7. Structurally, how are ADP and ATP similar? How are they different?
8. How does a cell release energy?
Determine if the statement is true. If it is not, rewrite the italicized part to make it true.
9. Cells break down carbohydrates to absorb energy and form ATP. _______________
10. Autotrophs make complex sugars for food. ___________________________
11. Autotrophs trap energy from sunlight and use this trapped energy to produce carbohydrates in a process called
chemosynthesis. _______________
12. Sunlight is the natural energy source for photosynthesis. _______________
13. Chlorophyll absorbs green light and some yellow light. _______________
14. Chlorophyll is found in the mitochondria of green plants. _______________
15. Chloroplasts contain thylakoid membranes, in which energy from sunlight is trapped by chlorophyll.
_______________
Examine the general equation for photosynthesis. Then complete each statement.
6 CO2 + 6 H2O + Light Energy
Chlorophyll
C6H12O6 + 6 O2
16. In photosynthesis, ____________________ energy is converted to chemical energy.
17. ____________________ and _____________________ are two compounds needed for photosynthesis.
18. Photosynthesis results in the production of the simple sugar ___________________ and free ___________________ .
Read each description and identify the process described. Use these choices : Calvin cycle, light reactions.
20. Light energy converted to chemical energy
The photo part of photosynthesis
Water molecules split
Oxygen given off
____________________________
21. Forms simple sugars
The synthesis part of photosynthesis
Uses CO2
____________________________
Choose the best response or that best completes the statement.
____ 22. Of the following molecules vital to life on Earth, which one is released during the light reactions?
a. CO2
b. H2O
c. O2
d. C6H12O6
____ 23. Of the following, the one not produced during the light reactions is
a. C6H12O6
b. hydrogen ions
c. O2
d. ATP
____ 24. The first part of the Calvin cycle involves
a. photolysis
c. the light reactions
b. synthesis of starch
d. carbon fixation
____ 25. The Calvin cycle reactions take place in the
a. mitochondria
c. stroma
b. ribosomes
d. thylakoid membranes
____ 26. The overall effect of the Calvin cycle is that CO2 combines with hydrogen to form
a. lipids
b. proteins
c. cellulose
d. simple sugars
____ 27. Of the following, what is not needed for the Calvin cycle to occur is
a. hydrogen ions
b. ATP
c. O2
d. CO2
For each statement below write true or false. If false, make it true.
________ 28. All bacteria are able to capture energy from sources other than the sun.
________ 29. Photosynthesis is a process by which a heterotroph obtains energy from inorganic compounds instead of
from light.
________ 30. All plant and animal communities need the sun as an energy source.
________ 31. Some bacteria rely on energy from reactions of inorganic sulfur compounds that come from the ocean
floor.
________ 32. The process of chemocytosis is the beginning of the food chain down at the bottom of the ocean floor
near the ocean vents.
4