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Due__________________________
Name______________________________________________
Class Period___________
PHOTOSYNTHESIS HW REVIEW
ENERGY AND LIFE
MULTIPLE CHOICE: CIRCLE ALL THE ANSWERS THAT ARE TRUE. THERE MAY BE MORE THAN
ONE CORRECT ANSWER!
1. Which molecule stores more than 90 times the energy in an ATP molecule ?
A. ADP
B. water
C. glucose
D. adenine
2. All organisms get the ENERGY they need to regenerate ATP from __________________________
A. phosphates
B. foods like glucose
C. organelles
D. ADP
3. CIRCLE ALL THE STATEMENTS THAT ARE TRUE about ATP.
A. ATP consists of ribose sugar, adenine, and 3 phosphate groups
B. ADP forms when ATP loses a phosphate and releases energy.
C. Used ATP is discarded by the cell as waste.
D. ATP provides energy for active transport in cells.
What is it called?
4.
5.
DESCRIPTION
Organisms that can make their own
food
Organisms that obtain energy from
the food they eat
GIVE 2 EXAMPLES
6. What is the ultimate source of energy that AUTOTROPHS use to produce their own food? ___________________
7. On the line below each picture, classify the organism as either an AUTOTROPH or a HETEROTROPH.
_______________________
_______________________
_______________________
8. NAME THE CHEMICAL COMPOUND SHOWN BELOW THAT CELLS USE TO STORE ENERGY._________
9. LABEL THE PARTS THAT MAKE UP THIS MOLECULE:
A= __________________________________
B= __________________________________
C= __________________________________
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Due__________________________
10. WHAT DOES ATP STAND FOR?
A_______________________ ________________________________________
11. HOW MANY PHOSPHATES ARE IN ONE MOLECULE OF ADP? ____________
12. HOW MANY PHOSPHATES ARE IN ONE MOLECULE OF ATP? ____________
13. WRITE THE CHEMICAL EQUATION THAT SHOWS HOW ADP IS MADE INTO ATP.
__________________________________________________________________________________
14. USE the words: ENERGY STORING and ENERGY RELEASING to label what is happening in the reactions shown
below: (Hint: Look at what the phosphate group is doing !)
_____________________________________
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PHOTOSYNTHESIS: An Overview
MULTIPLE CHOICE: CIRCLE ALL THAT ARE TRUE. THERE MAY BE MORE THAN ONE CORRECT
ANSWER!
15. Pigments like (chlorophyll and carotene) are molecules that plants use to _________________________.
A. join ATP
B. transport electrons down the Electron Transport chain
C. charge up NADPH
D. absorb energy from light
16. Chlorophyll absorbs light very well in the _______________ regions of the visible spectrum.
(Circle all that are true)
A. blue-violet
B. green
C. red
D. yellow
17. Most plants appear green because chlorophyll _________________________________________.
A. reflects green light
B. absorbs green light
18. 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
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19. Match the scientist with his contribution to our understanding of photosynthesis:
_____ Showed plants produce oxygen when
exposed to light
A. JOSEPH PRIESTLEY
_____ Carefully measured the mass of a growing plant
and concluded the increase came from water
B. JAN VAN HELMONT
_____ Experimented with a plant, bell jar, and candle
C. JAN INGENHOUSZ
to show that plants make oxygen
D. MELVIN CALVIN
_____ Received the Nobel prize for figuring out the
biochemical pathway that produces glucose
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Due__________________________
20. Write the complete overall chemical equation for photosynthesis using NUMBERS and chemical symbols instead of
words:
___________
__________________ + ___________________ → __________________ + ___________________
21. How many molecules of carbon dioxide (CO2) are used to make 1 molecule of glucose (C6H12O6) ?
1
2
3
6
12
22. In addition to water and carbon dioxide, what two things are required for photosynthesis to happen?
_______________________ and _______________________
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THINK ABOUT IT.
23. If a plant is kept under green-colored light for an extended period of time, what do you think will happen to the rate of
photosynthesis?
__________________________________________________________________________________________________
__________________________________________________________________________________________________
24. Why are the carotenoid colors (like red, orange, brown) visible in leaves in the fall, but not other times?
__________________________________________________________________________________________________
25. How do other colored pigments like the carotenoids help chlorophyll carry out photosynthesis?
__________________________________________________________________________________________________
37. Name 3 factors that affect the rate at which photosynthesis occurs.
1. _____________________________________________________________
2. _____________________________________________________________
3. _____________________________________________________________
38. 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. ________________
T
F
Electrons are energized twice during photosynthesis. ________________
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Due__________________________
39. USE THE LETTERS IN THE DIAGRAM AT THE LEFT TO IDENTIFY:
______ stroma
______ thylakoid
______ granum
______ thylakoid space
______ cytoplasm
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40. COLOR THE DIAGRAM ABOVE AS DESCRIBED:
Color the energy from sunlight YELLOW
Label PHOTOSYSTEM I and II
Color the two photosystems GREEN
Color the hydrogen ions PINK
Color the electrons RED
Color ATP SYNTHASE ORANGE
Color the PHOSPHOLIPIDS of the thylakoid membrane BLUE
47. 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
Requires light
part of thylakoid membrane
Doesn’t require light
O2
ATP
CO2
H2O
SUGARS (glucose)
LIGHT-DEPENDENT REACTIONS
LOCATION
REACTANTS
PRODUCTS
IS LIGHT REQUIRED?
NADPH
CALVIN CYCLE