1. Photosynthesis Review

2. Plants “look green” because they
_____________ green wavelengths of light.
absorb reflect
reflect
Photosynthesis in plants takes place
inside which organelle?
chloroplasts

3. pigment Chlorophyll b Chlorophyll a
A _________________ is a molecule (like chlorophyll) that absorbs energy and is used by green plants to absorb sunlight.
Name the two types of chlorophyll
________________ & _________________
pigment
Chlorophyll b
Chlorophyll a

4. Blue-violet and red wavelengths
Absorption of Light by
Chlorophyll a and Chlorophyll b
© Pearson Education, Inc. Publishing as
Pearson Prentice-Hall. All rights reserved.
Which wavelengths
of light do
chlorophyll a and
chlorophyll b
absorb best?
Chlorophyll b
Chlorophyll a
Blue-violet and red wavelengths

5. Which wavelength of light does Chlorophyll a and chlorophyll b
Absorption of Light by
Chlorophyll a and Chlorophyll b
© Pearson Education, Inc. Publishing as
Pearson Prentice-Hall. All rights reserved.
Which wavelength
of light does
Chlorophyll a and
chlorophyll b
Absorb the least?
Chlorophyll b
Chlorophyll a
They do not
absorb green light.

6. Name the molecule used by living things to store and transfer energy =___________________________
ATP/adenosine triphosphate

7. Use words to fill in the overall chemical reaction for photosynthesis.
___________+___________ __________ + __________
Carbon dioxide water
Sugars oxygen

8. Land plants get the carbon dioxide needed for photosynthesis from the _____________
atmosphere
Name the high energy electron carrier that picks up electrons and H+ ions when water is split.
NADP+

9. This organism is a _____________.
heterotroph
This organism is a _____________.
autotroph heterotroph
Image from:

10. #2 is called ________________.#1
Photosynthesis #2
Name the 2 sets of reactions that make up photosynthesis:
#1 is called ___________________.
Light-Dependent Reactions
#2 is called ________________.
Calvin Cycle
(or Light-independent Reactions)

11. Label the reactants and products for the Light dependent reactions #1 #3
Photosynthesis #2
Label the reactants and products for the Light dependent reactions
#1 = __________________
#2 = __________________
#3 = __________________
SUNLIGHT and WATER
ATP and NADPH
Oxygen

12. Label the reactants and products for the Calvin cycle
Photosynthesis #1
Calvin CYCLE #2 #3
Label the reactants and products for the Calvin cycle
#1 = __________________
#2 = __________________
#3 = __________________
ATP & NADPH
carbon dioxide
Sugars

13. Space surrounding the thylakoids is called the _______________.
stroma
Stacks of thylakoids are called ________.
If you were talking about only one of these
you would call it a ______________
The main photosynthetic pigment in
green plants = ___________________
grana
granum
chlorophyll

14. Where does the Calvin cycle happen?
The clusters of proteins in the thylakoid membrane that collect light are called ________________
Where does the Calvin cycle happen?
A protein that helps chemical reactions
happen faster in living things is called an _______________
PHOTOSYSTEMS
In the stroma
enzyme

15. The Calvin cycle requires light.
TRUE or FALSE
The Calvin cycle requires light.
FALSE: It is light INDEPENDENT
Light-Dependent Reactions break apart ________ and give off _______ gas.
water
oxygen

16. This stack of membrane sacs is called a ________________
Which part of photosynthesis happens here?
granum
Light dependent reactions

17. Which part of photosynthesis happens here?
This space around the
grana is called
the _____________
Which part of photosynthesis happens here?
stroma
Calvin cycle

18. An organism that can make its own food like a green plant is called an
Carotenoids
______________ are
plant pigments that
are orange or yellow
instead of green
An organism that can make its own food like a green plant is called an
_______________
autotroph

19. Molecules that interact in a chemical reaction that are written on the left side of a chemical equation are called ________________
An organism that CAN’T make its own food and must get its energy from consuming other organisms
reactants
heterotroph

20. Reactions of photosynthesis that use light energy to produce ATP and NADPH
Large protein in the thylakoid membrane that uses energy from H+ ions to join ADP and a phosphate group to make ATP
Light-dependent reactions
ATP synthase

21. An organism like a green plant that can make its own food
Molecule made of ribose, adenine, and 3 phosphates used by living things to store and release energy
AUTOTROPH
ATP

22. Pigments that are yellow or orange not green
Clusters of light collecting
proteins found in the thylakoid
membrane
Space surrounding the thylakoids
inside a chloroplast
carotenoids
photosystems
stroma

23. Stack of thylakoid membranes
Process by which plants and some other organisms use sunlight to convert water and carbon dioxide (CO2) into oxygen (O2) and high energy carbohydrates
Stack of thylakoid membranes
PHOTOSYNTHESIS
GRANUM (pl. GRANA)

24. 6 carbon sugar molecule that is
the main product of photosynthesis and is used as the fuel burned by cells
glucose

25. Negatively charged particle found circling the nucleus of an atom
Reactions of photosynthesis in which energy from ATP and NADPH is used to build high energy sugar molecules
Negatively charged particle found circling the nucleus of an atom
Calvin cycle
electron

26. Molecules that are produced during a chemical reaction that are written on the right side of a chemical equation
High energy electron carrier which receives electrons and H+ ions when water splits during the light dependent reaction
products
NADP+

27. Difference in concentration in one place compared to another
Group of membrane proteins that transfers electrons between Photosystem II and I during the light-dependent reaction of photosynthesis
Concentration gradient
ELECTRON TRANSPORT CHAIN

28. Label molecules of the light dependent reactions.
PHOTOSYSTEM II
Electron Transport Chain
PHOTOSYSTEM I
ATP Synthase

29. Which gas that we need is given off during photosynthesis?
Which ion moves across the membrane to power the ATP synthase enzyme to add a phosphate to ADP?
Where do the carbon atoms come from that end up in carbohydrates made by the Calvin cycle?
Which gas that we need is given off
during photosynthesis?
H+ (Hydrogen ion)
Carbon dioxide
oxygen

30. Where do H+ ions build up as water is broken down and the light dependent reactions are happening?
Where to does the ATP and NADPH produced during the light-dependent phase end up?
Thylakoid space
It is used by the Calvin cycle to make sugar

31. #1 = ___________________ #2 = ___________________
Label reactants and products for photosynthesis:
#1 = ___________________
#2 = ___________________
#3 = ___________________
#4 = ___________________
#5 = ___________________
WATER
OXYGEN
Carbon dioxide
SUGAR
Light energy

32. Which molecule is broken to provide the H+ to make NADPH?
Which molecule spins as H+ ions pass through to the other side of the membrane?
H2O
ATP synthase

33. This organism is a(n) _____________.
autotroph heterotroph
Heterotroph
Fungi get their energy
by absorbing nutrients
from dead organisms.

34. Many enzymes have this ending on their names = _________
Name 2 factors that can affect the rate of photosynthesis.
What do you think would happen to the rate of photosynthesis on a cloudy day?
-ASE
Temperature, availability of water,
and light intensity
It would be slower than on a sunny day

35. How many phosphate groups are in a molecule of ADP?
Write the equation for changing ADP into ATP. 2
ADP + P + energy → ATP

36. What compounds are formed from carbon dioxide during the Calvin cycle?
Which part of photosynthesis can continue at night?
sugars
Calvin cycle

37. Another name for the Calvin cycle
How are photosystem I and II alike?
How are they different?
Light INDEPENDENT reactions
Both are light dependent
Both use light to energize electrons
II- splits water molecules
I- NADPH is made

38. This organism is a(n) _____________.
autotroph heterotroph
autotroph

39. STORE This reaction shows how cells _______________ energy
Write the chemical equation for photosynthesis
___________+___________ → __________ + __________
6 CO2
6 H2O
C6H12O6
6 O2
This reaction shows how cells
_______________ energy
STORE RELEASE
STORE
Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006

40. RELEASE This reaction shows how cells _______________ energy
Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006
This reaction shows how cells
_______________ energy
STORE RELEASE
RELEASE

41. A = ______________________ B = ______________________
Label A and B
A = ______________________
B = ______________________
Thylakoid space (space inside thylakoid sac)
stroma
Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006

42. Label the parts of this chloroplast
A (individual membrane sac) = _________________
B (space inside the sac) = _____________________
C (stack) = __________________
D (space surrounding the sacs) = ________________
E (space outside the chloroplast) = ________________
thylakoid
Thylakoid space
Granum (pl. grana)
stroma
cytoplasm
Image from: BIOLOGY by Miller and Levine; Prentice Hall Publishing©2006