Bioenergetics Unit Test: Practice Guide Answers!
Part A: Complete the following questions:
1.) What are the reactants and products of photosynthesis?
Reactants: CO2+ H2O+SUNLIGHT
Products: C6H12O6+ O2
2.) What are the reactants and products of cellular respiration?
Reactants: C6H12O6+ O2
Products: CO2+ H2O+ ATP
3.)What is glucose? What is its role in photosynthesis and cellular respiration? Where is the
energy stored? Sugar; Stores energy in bonds of ATP; Chemical bonds
4.)What are the steps of anaerobic cellular respiration? Glycolysis pyruvate fermentation
5.)What organisms carry out photosynthesis? a.Plants b.some bacteria c.some protists
6.) What are the steps of aerobic cellular respiration? What is the final electron acceptor creating
water as a waste product? Glycolysis Kreb’s cycle Electron Transport Chain; oxygen
7.)Explain how an athlete may develop cramps during exercise. Lack of oxygen
8.)What organelle is associated with cellular respiration? Mitochondria
9.) What organelle is associated with photosynthesis? chloroplast
10.)What is ATP? What does it stand for? Why is it important? Adenosine triphosphate; Supplies
energy for cellular respiration
11.)How is ATP like a rechargeable battery? Uses energy for cell activities; low energy form is
ADP like an uncharged battery. Food recharges ADP to ATP
12.)What are cristae? Why are they important in the mitochondria? Inner membrane of
mitochondria; they increase the surface area producing more ATP during cellular respiration
13.)Explain what fermentation is. What are the two types? Why does this occur? What gas is
produced? Anaerobic respiration – no oxygen is available; Lactic acid = muscles; Alcoholic =
yeast; produces CO2
14.)Where might you find many mitochondria in the human body? Why? Muscle cells; lots of
energy needed for movement
15.)What are the two steps of photosynthesis? What product is formed in each?
Step 1: light-dependent
Product of Step 1: O2
Step 2: Calvin cycle
Product of Step 2: glucose
16.) What are examples of “cellular work”? growth, reproduction, repair
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Bioenergetics Unit Test: Practice Guide Answers!
Part C: Complete the following analysis problems:
18.) Explain the following relationships:
a. Temperature increases, gas production increases
b. Time increases, gas production increases
19.) What is deforestation? How does it relate to the products of photosynthesis? Cutting down trees;
less O2 and more CO2
20.) Describe the process depicted in the image on the right in 3 to 5 steps.
animals add wastes CO2+ H2O to environment; plants use wastes to photosynthesize
21.) Three students are investigating the effect of light color on photosynthesis by the aquatic plant
Elodea. The students tested different light colors to see the effect of each. To test the color that kept the
distance constant and varying the filtered light from clear, red and green. They measure bubbles
produced per minute for each color and recorded the data in the chart below. Use the following
experimental set up to complete the questions below.
Data Table: Bubbles produced by light color
Experiment Size of
Bulb
Color of
test tube
Distance
1
2
3
Clear
Red
Green
10 cm
10 cm
10 cm
100W
100W
100W
Oxygen
bubbles per
min.
10.25 b/m
5.25 b/m
3.9 b/m
a. What is the best conclusion you can make based on the data given about light color and rate of
photosynthesis? Clear light color increases photosynthesis due to the largest number of bubbles
22.) Use the diagrams below to answer the question.
energy in
energy in
photosynthesis
cellular respiration
Energy out
Energy out
a. Describe the energy transformations that occur in the processes above. Be sure to include the
types of energy and the molecules where the energy is located. Sunlight chloroplast glucose
b. Describe how energy transformations involved in photosynthesis are related to energy
transformations involved in cellular respiration. The products of photosynthesis are the reactants
of cellular respiration.
c. How does this energy cycle in an environment? The waste of photosynthesis are used in cellular
respiration
Good Luck Studying!!
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