UNIT 3 REVIEW: PHOTOSYNTHESIS AND CELLULAR RESPIRATION
3.A- Formulas, ATP/ADP, Organelles, and Energy
1. What is the difference between autotrophs and heterotrophs?
AUTOTROPHS MAKE THEIR OWN FOOD
HETEROTROPHS CONSUME THEIR FOOD
2. Name the chemical compound shown below that cells use to store energy.
ATP
Label the parts that compose this molecule:
A= ADENINE
B= RIBOSE
C=PHOSPHATE GROUPS
3. Fill out the chart about ATP/ADP.
How many phosphate molecules does each have?
How many adenine molecules does each have?
Which compound has more stored energy?
Which compound results when energy is given
off due to breaking of bonds?
ATP 3 ADP 2
ATP 1 ADP 1
ATP > ADP
ADP
4. What is the overall reaction for photosynthesis? Draw arrows to show what is being oxidized
and reduced.
Water ------------------------------ oxygen
oxidize
6 CO2 + 6H2O ----------------------------
C6H12O6 + 6O2
light d
CO2 -------------------------------------------------> glucose
reduced
5. What is the overall reaction for cellular respiration? Draw arrows to show what is being oxidized
and reduced.
oxygen
reduced
->
water
C6H12O6 + 6O2 6 CO2 + 6H2O + ATP
Glucose
-> carbon dioxide
Oxidized
6. Label the two organelles below. Tell which organelle is involved in photosynthesis and which is
involved in cellular respiration.
GRANUM
OUTER
MEMBRANE
OUTER
MEMBRANE
OUTER MEMBRANE
LUMEN (SPACE)
INNER MEMBRANE
INTER MEMBRANE SPACE
CHRISTAE
MATRIX
INNER
MEMBRANE
STROMA
Site of PHOTOSYNTHESIS
THYLAKOIDS
Site of RESPIRATION
3.B- Photosynthesis and Cellular Respiration
7. Fill out the following chart about photosynthesis and the two stages.
Stage
LIGHT DEPENDENT
REACTIONS
Location
THYLAKOID
MEMBRANES
(GRANUM)
Events


SUNLIGHT AND WATER GO IN
OXYGEN, NADPH, ATP COME OUT

LIGHT INDEPENDENT
REACTIONS OR
CALVIN CYCLE
STROMA
(INVOLVES AN ETC THAT WILL SPLIT WATER
INTO 02 IN PSII AND A PSI THAT REDUCES
NADP+ TO NADPH.
 ETC GENERATES A PROTON GRADIENT
THAT WILL ALLOW ATP SYNTHASE TO
PHOSPHORILATE ADP+ INTO ATP)
CO2, NADPH, ATP GO IN
GLUCOSE, NADP+, ADP COME OUT
(CO2 IS “FIXED” HERE.
RUBISCO CATALYZES THE REACTION WHERE CO2
AND RuBP FORM PGA.
NADPH AND ATP ARE USED TO REGENERATE
RuBP AND CONTINUE THE CALVIN CYCLE.)
7. What photosynthesis waste product is formed in the light-dependent reactions? O2
8. What two products of the light-dependent reactions are used up in the light-independent
reactions?
NADPH AND ATP
9. What happens to carbon dioxide molecules in the light-independent reactions? THEY ARE
“FIXED” INTO AN ORGANIC COMPOUND CALLED PGA. RUBISCO CATALYZES THIS
REACTION WITH RuBP.
10. What are the differences between the light-dependent reactions and the light-independent
reactions?
LIGHT DEPENDENT: NEED LIGHT; HAPPENS IN THYLAKOIDS; MAKES ENERGY (ATP,
NADPH)
LIGHT INDEPENDENT; NO LIGHT NEEDED; HAPPENS IN STROMA; USES ENERGY (ADP,
NADP+)
11. What other name is given to light-independent reactions?
CALVIN CYCLE
12. Label the diagram below to summarize the two stages of photosynthesis. Use the word bank
below the diagram to fill in the blanks.
2. H20
CO2
SUNLIGHT
4. STROMA
4. _____
_
5.
6. LIGHT
DEPENDEN
T
REACTIONS
9.12. _______
10. O2
11.
LIGHT
INDEPENDENT
REACTIONS
ATP
NADPH
GLUCOSE
Word list:
thylakoid
6
granum
5
stroma
11
light-dependent reactions
light-independent reactions
light
H2O
sugar
CO2
NADPH
ATP
O2
13. Fill out the follwing chart about Cellular Respiration.
Stage
GLYCOLYSIS
Location
CYTOPLASM
Events





KREBS CYCLE (CITRIC
ACID CYCLE)
MITOCHONDRIAL
MATRIX

ELECTRON TRANPORT
CHAIN (OXIDATIVE
PHOSPHORILATION
AND CHEMIOSMOSIS)
MITOCHONDRIA’
INNER MEMBRANE

Initial process of oxidation of glucose that occurs in the cytoplasm
converts each molecule of glucose to two molecules of pyruvic
acid/pyruvate (a 3-carbon molecule)
an anaerobic process - proceeds whether or not O2 is present; O2 is not
required
net yield of 2 ATP per glucose molecule
net yield of 2 NADH per glucose (NADH is nicotine adenine
dinucleotide, a co-enzyme that serves as a carrier for H+ ions and
electrons from breaking down glucose)
The pyruvic acid diffuses into the mitochondrion where a transition
reaction (‘grooming’/ pre-Krebs) occurs that serves to prepare pyruvic
acid for entry into the next stage of respiration. The two 3-Carbon
pyruvates each lose CO2 and become acetylCoA. 2 total CO2 are
produced (*as well as 2 NADH)
2 ATP ARE PRODUCED, 6 NADH, 2 FADH2, 6 CO2
electrons are released from NADH and from FADH2 and as they are
passed along the series of proteins, they give up energy which is used to
fuel a process called chemiosmosis by which H+ ions are actively
transported across the inner mitochondrial membrane into the
intermembrane space. The accumulation of H+ ions (protons) cause
ATP Synthase in the membrane to change shape, and they flow back
through the membrane and cause ~ 32-34 ATP’s to be produced.
6 H2O are formed when the electrons and H+ unite with O2 at the end of
electron transport chain
14. How many ATP are made in the glycolysis part of cellular respiration?
2
15. How many ATP are made in the Kreb’s cycle and electron transport part of cellular respiration?
2 ATP IN KREBS; 32 ATP IN ETC
16. In which phase of cellular respiration is carbon dioxide made? Water?
CO2: KREBS.
WATER: ETC
17. What would happen to the cellular respiration process if the enzyme (aka catalyst) for one step
of the process was missing or defective?
NO ATP WOULD BE PRODUCED
18. Fill out the following diagram about Cellular Respiration.
GLYCOLYSIS
NADH,
FADH2
KREBS
PYRUVATE
ETC
H2O
O2
2ATP
Word List
Glycolysis
ATP
Chain
Water
CO2
2ATP
32ATP
Kreb’s Cycle
ATP
ATP
Carbon Dioxide
Oxygen Gas
Electron Transport
Electrons Carriers
Calvin Cycle
ADP
3.C- Anaerobic Cellular Respiration
19. What are the 2 metabolic pathways a cell can use and what determines which pathway is
used?
IN ANAEROBIC RESPIRATION:
GLYCOLYSIS: GLUCOSE ->PYRUVATE-> LACTIC ACID (MUSCLE CELLS AND DAIRY
BACTERIA)
GLUCOSE -> PYRUVATE -> ETHANOL (YEAST, SOME BACTERIA)
20. Where does the process of fermentation take place? CYTOPLASM