Name _______________________________ Date _____________ Block __________
Cell Energy Review Questions
1.What is the source of all energy on Earth? THE SUN
2.Photosynthesis converts energy from SUNLIGHT into GLUCOSE, a form of chemical
energy.
3.What organisms are capable of performing this function? Give at least 2 examples.
AUTOTROPHS; TREES, GRASS, ANY PLANT
4.What part of the plant is responsible for producing the most food? Label the parts of a
plant. LEAVES
5.What tissue of the leaf is responsible for producing the most food? Label the tissues
of a leaf. MESOPHYLL
6.What organelle of a plant cell is responsible for producing the most food? Label the
parts of a chloroplast. CHLOROPLAST
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7.Where in the chloroplast do the Light reactions occur? THYLAKOID
8.Where in the chloroplast does the Calvin cycle occur? STROMA
9.Write the equation for photosynthesis below. Underneath the chemicals, identify
which part of photosynthesis each chemical is a reactant or product of (LR or CC).
6CO2
CC
+
6H2O  C6H12O6 + 6CO2
LR
LR
CC
10.Which chemicals transfer energy from the Light Reactions to the Calvin Cycle?
NADPH & ATP
11.What does NADPH become when is releases electrons? NADP+
12.What does ATP become when energy is released? ADP
13.Where in a chloroplast will you find the most chlorophyll? THYLAKOID
14.Explain why plants with a lot of chlorophyll do not grow well under green light.
CHLOROPHYLL IS GREEN BECAUSE IT REFLECTS GREEN LIGHT. IF ONLY
GREEN LIGHT IS PROVIDED, CHLOROPHYLL WILL NOT BE ABLE TO ABSORB
ANY LIGHT ENERGY FOR PHOTOSYNTHESIS
15.In a hypothetical experiment, a scientist enclosed two plants into two plastic bags.
Both were ivy plants, had the same starting mass, were given the same amount of
water and had the same amount of soil and sunlight. However, the scientist would talk
to one of the plants through a small opening three times a day. He would always reseal
the bag. After two weeks, he found the masses of each plant and found that the plant
he talked to had more mass than the plant he did not talk to. Explain the results.
BY TALKING TO THE PLANT, THE SCIENTIST WAS PROVIDING MORE CARBON
DIOXIDE. WITH MORE CARBON DIOXIDE, THE PLANT IS ABLE TO DO MORE
PHOTOSYNTHESIS (SPECIFICALLY, THE CALVIN CYCLE) AND MAKE MORE
FOOD. MORE FOOD PROVIDES MORE ENERGY TO GROW.
Name _______________________________ Date _____________ Block __________
1.Cellular Respiration converts energy from GLUCOSE into ATP, a form of chemical
energy.
2.This process is AEROBIC and can only occur in the presence of OXYGEN.
3.What organisms are capable of performing this function? Give at least 5 examples.
AUTOTROPHS & HETEROTROPHS (ALL ORGANISMS): PLANTS, ANIMALS,
FUNGI, PROTISTS
4.What organelle (part of the cell) is responsible for carrying out Cellular Respiration?
MITOCHONDRION
5.Label the parts of a mitochondrion.
6.What are the 3 main reactions that occur in Cellular Respiration?
GLYCOLYSIS, KREBS CYCLE, ELECTRON TRANSPORT CHAIN
7.Where in the cell does Glycolysis occur? CYTOPLASM
8.Where in the mitochondrion does the Krebs Cycle occur? MATRIX
9.Where in the mitochondrion does the Electron Transport Chain occur? INNER
MEMBRANE
10.Explain why it is beneficial for a mitochondrion to have more cristae?
MORE CRISTAE MEANS MORE FOLDS IN THE INNER MEMBRANE. WITH MORE
FOLDS, MORE SURFACE AREA IS AVAILABLE FOR MORE REACTIONS FROM
THE ELECTRON TRANSPORT CHAIN. THIS ALLOWS THE MITOCHONDRION TO
MAKE EVEN MORE ATP.
Name _______________________________ Date _____________ Block __________
11.Write the equation for Cellular Respiration below. Underneath the chemicals,
identify which part of Cellular Respiration each chemical is a reactant or product of (G,
KC or ETC).
C6H12O6 + 6O2  6CO2 + 6H20
G
ETC
KC
ETC
12.Which chemicals transfer energy from the Kreb Cycle to the Electron Transport
Chain? NADH & FADH2
13.What does NADH become when it releases electrons? NAD+
14.What does FADH2 become when it releases electrons? FAD
15.What enzyme is responsible for making ATP? ATP SYNTHASE
16.What does oxygen do that is so important?
OXYGEN ACCEPTS THE ELECTRONS AS THEY FINISH PASSING THROUGH THE
ELECTRON TRANSPORT CHAIN. TOGETHER, THEY BECOME WATER.
17.Which part of cellular respiration releases CO2? KREBS CYCLE
18.How much ATP can be produced from 1 molecule of glucose? 38 ATP
19.Explain why there is only a net production of 2 ATP from glycolysis. 2 ATP ARE
USED TO START THE PROCESS (INVESTMENT) AND 4 ATP ARE PRODUCED AT
THE END OF GLYCOLYSIS. 4 ATP – 2 ATP = 2 ATP NET
20.A small water plant is placed in a solution of Bromothymol blue. BB turns a yellow
color when it absorbs CO2 from the air (it makes the solution acidic). Explain why when
the plant is in the sunlight, the solution remains blue, but when placed in darkness for
several hours, the solution turns yellow.
IN THE SUNLIGHT, THE PLANT IS ABLE TO CONDUCT PHOTOSYNTHESIS, SO IT
USES THE CO2 AND THE SOLUTION REMAINS BLUE. IN THE DARK, THE PLANT
CAN ONLY DO CELLULAR RESPIRATION AND NOT PHOTOSYNTHESIS. IT
PRODUCES CO2 AND THE SOLUTION TURNS YELLOW.
1.When oxygen is NOT present, FERMENTATION converts glucose (chemical energy)
into ATP.
2.This process occurs in the CYTOPLASM of the cell. And only produces 2 ATP.
3.It is called ANAEROBIC since it can occur without oxygen.
4.Alcoholic Fermentation can occur in YEAST and BACTERIAL cells. It produces CO2
and ETHANOL.
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5.Lactic Acid Fermentation can occur in MUSCLE and BACTERIAL cells. It produces
LACTIC ACID.
6.Name food products from each type of Fermentation. YOGURT, CHEESE, PICKLES,
KIMCHI, ALCOHOLIC BEVERAGES, SAUERKRAUT…
Critical Thinking Questions:
1. Compare and contrast Alcoholic Fermentation with Cellular Respiration.
2. Describe the relationship between Photosynthesis and Cellular Respiration.
3. Explain the importance of recycling NAD+ in Fermentation
4. Explain how breathing is related to Cellular Respiration.
5. Explain the benefits of Aerobic Respiration over Anaerobic Respiration. Explain
the benefits of Anaerobic Respiration over Aerobic Respiration.