Name_________________________________ Date ___________ Period________
PHOTOSYNTHESIS REVIEW
Label and define the following leaf structures:
Cuticle-waxy covering on top of leaves
Epidermis-outermost cells
Mesophyll- area where photosynthesis occurs
Stoma (Stomata)-openings for CO2+ and O2 transfer
Vein (includes xylem and phloem)-carry nutrients and
water to and from the leaves
Guard cells-allow stomata to open and close
MULTIPLE CHOICE: CIRCLE ALL THE STATEMENTS THAT ARE TRUE OR COMPLETE THE
STATEMENT. THERE MAY BE MORE THAN ONE CORRECT ANSWER.
Which molecule stores more than 90 times the energy in an ATP molecule?
A. ADP
B. water
C. glucose
D. adenine
All organisms get the ENERGY they need to regenerate ATP from __________________________
A. phosphates
B. foods like glucose
C. organelles
D. ADP
What is it called?
autotroph
heterotroph
DESCRIPTION
Organisms that can make their
own food
Organisms that obtain energy
from the food they eat
GIVE 2 EXAMPLES
Plants, algae
Animals, fungi
What is the ultimate source of energy autotrophs use produce their own food? ____Sun____
On the line below each picture, classify the organism as either an AUTOTROPH or a HETEROTROPH.
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___heterotroph________
Hint: What color are mushrooms?
______autotroph______
______heterotroph_____
NAME THE CHEMICAL COMPOUND SHOWN BELOW THAT CELLS USE TO STORE ENERGY. ATP__
LABEL THE PARTS THAT MAKE UP THIS MOLECULE:
A= ___________adenine________________
B= _________ribose_____________
C=______phosphates______________
WHAT DOES ATP STAND FOR?
A__denosine_____________________ T____riphosphate_______________________
HOW MANY PHOSPHATES ARE IN ONE MOLECULE OF ADP? ___2____
HOW IS ATP MADE FROM ADP?
Add one phosphate to ADP, ______________________________
USE the words: ENERGY STORING and ENERGY RELEASING to label what is happening
in the reactions shown below:
________releasing__________
________storing________
Describe what Jan van Helmont discovered with his 5 year experiment.
He discovered that plants absorb water and need the water to grow
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What did Priestly discover about photosynthesis?
Plants give off O2
Jan Ingenhousz showed the effects of Priestly’s experiment only happens when the plants are exposed to
_light________.
Where in
A.
B.
C.
D.
a plant cell does photosynthesis take place?
Mitochondria
Lysosome
Nucleus
Chloroplast
USE THE LETTERS IN THE CHLOROPLAST DIAGRAM TO IDENTIFY:
_A___ stroma
__C__ thylakoid
__B__ granum (grana)
C
Plants gather the sun’s energy with light-absorbing MOLECULES called __________________.
A. thylakoids
B. pigments
C. chloroplasts
D. glucose
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Use the absorption spectrum of chlorophyll below to answer the following questions.
According to the graph above, which of the following wavelengths is most reflected by chlorophyll a?
a. 465 nm
b. 490 nm
c. 625 nm
d. 665 nm
According to the graph, which of the following colors whould be best to shine on a plant to maximize
photosynthesis?
a. green
b. yellow
c. orange
d. red
Write the colors of the 3 accessory pigments:
Carotenoids-yellow and orange
Anthocyanin-blue and red
Xanthophyll- yellow
How does the energy compare of waves in the EM spectrum that have longer vs. shorter wavelengths?
Shorter wavelengths have more energy
How can you remember the colors of the rainbow? Which color has the most energy and the least?
ROYGBIV, violet most and red least
Plants appear green to us because they ___reflect__ green wavelengths and _absorb_____all of the
other colors of wavelengths.
What environmental factor is the cause for leaves to start to change color?
Shorter days
Why is it that we see reds, yellows, and oranges on the leaves in the fall?
The chlorophyll is pulled into the trunk of the tree for the winter months and the remaining pigments are
able to be seen until they break down.
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Write the complete overall chemical equation for photosynthesis using CHEMICAL SYMBOLS:
____sun_______
___6CO2____
+ ___6H O___
2
→ ____6O ____ + __C H
2
6
12O6___
Write the complete overall chemical equation for photosynthesis using WORDS:
__sun___
__Carbon dioxide___
+ __water___
→ ____oxygen____ + ____glucose___
In this Diagram of photosynthesis, label light, water, oxygen, CO2, sugars, NADP+, ADP, NADPH, ATP,
light dependent reaction, Calvin cycle, granum, stroma
How many molecules of carbon dioxide (CO2) are used to make 1 molecule of glucose (C6H12O6) ?
1
2
3
6
12
A student conducts an experiment by collecting the gas given off by a green plant in bright sunlight at
room temperature. The gas being collected is probably ___________________.
A. ATP
B. water vapor
C. carbon dioxide
D. oxygen
Oxygen produced during the light-dependent reaction is __________________________.
A. used in the Calvin cycle to make sugar
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B. joined with the NADPH to make water
C. is released into the atmosphere
D. None of these, oxygen is NOT produced by the light-dependent reaction
Which molecule acts as a carrier for high energy electrons during photosynthesis?
A. ATP
B. H2O
C. NADP+
D. CO2
The Calvin cycle is another name for __________________________
A. photosynthesis
B. the electron transport chain
C. light-dependent reactions
D. light-independent reactions
Name 4 factors that affect the rate at which photosynthesis occurs.
1.
2.
3.
4.
___amount of sunlight___
__temperature____
___amount of water_______
____amount of CO2________
MODIFIED TRUE or FALSE
Circle T if the statement is TRUE.
Circle F if the statement is FALSE and use the blank provided to correct the underlined word/phrase.
T
F
Increasing light intensity decreases the rate of photosynthesis. _____________________
T
F
Carbon dioxide molecules enter the light-dependent reactions from the atmosphere.
______________________
T
F
Photosynthesis uses energy from ATP and high energy electrons from NADPH produced in
the light-dependent reactions to make glucose in the Calvin cycle. ___________________
T
F
The light-dependent reaction produces ATP, NADPH, and carbon dioxide. _____________
T
F
ATP synthase spins like a turbine as H+ ions pass through it to generate ATP. __________
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USE WORDS FROM THE WORD BANK TO FILL IN THE CHART COMPARING AND CONTRASTING THE
LIGHT-DEPENDENT REACTIONS AND THE CALVIN CYCLE: (You can use them more than once!)
in stroma
in thylakoid membrane
Requires light
O2
ATP
CO2
Doesn’t require light
H2 O
NADPH
SUGARS (glucose)
LIGHT-DEPENDENT REACTIONS
grana
CALVIN CYCLE
stroma
H 2O
CO2
O2
Sugar (glucose)
Needs light
Does not need light
LOCATION
REACTANTS
PRODUCTS
LIGHT?
THINK ABOUT IT
Which of these graphs represents the effect of temperature on the rate of photosynthesis? ______
(Hint: Many molecules that help with photosynthesis are enzymes)
EXPLAIN YOUR ANSWER. _____C, the enzymes denature is the temp gets too high
_______________________________
_________________________________________________________________________________
Which of these graphs represents the effect of light intensity on the rate of photosynthesis? ______
EXPLAIN YOUR ANSWER. ________A, rate will increase to a point and then plateau
__________________________
___________________________________________________________________________________
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