Name______Date______
PHOTOSYNTHESIS Questions
1. What organisms carry out photosynthesis?
PLANTS PROTISTS BACTERIA (AUTOTROPHS)
2. What is the difference between an autotroph and a heterotroph?
AUTO-MAKE HETERO-EAT
3. What are the light reactions of plants and in what organelle do they occur?
NONCYCLIC AND CYCLIC CHLOROPLAST (THYLAKOID)
4. Thylakoid stacks in chloroplasts are called ______.
GRANA
5. The gel like solution surrounds the thylakoids inside the chloroplast?
STROMA
6. What function does a pigment have in a plant?
ABSORB LIGHT ENERGY
7. What color(s) is absorbed by the chloroplast?
MAINLY RED AND BLUE-NO GREEN
8. Only ______is directly responsible for capturing light energy.
CHLOROPHYLL A IN THE REACTION CENTER
9. Chlorophyll B is an example of a ______pigment.
SECONDARY OR ACCESSORY
10. The light reactions start when ______pigments absorb ______.
CHLOROPHYLL A LIGHT
11. ______provides the replacement electrons for photosystem II when water is ______.
WATER SPLIT
12. What product of photosynthesis is produced from the splitting of water?
OXYGEN
13. The light –dependent reactions provide the ______and the ______needed to run the light independent reactions.
ATP NADPH
14. Photosynthesis begins when a photon of light strikes a ______within the “antennae” of a photosystem
PIGMENT
15. What is the role of these substances during the light reaction?
a. Chlorophyll ABSORB LIGHT ENERGY
b. NADP+ MAKE NADPH
c. Cytochrome system MAKE ATP BY PASSING ELECTRONS
d. Water FILLS ELECTRON HOLE OF PSII
e. ADP MAKE ATP
16. Label the following with THYLAKOID or STROMA
a. Does not require light S
b. Calvin CycleS
c. ATP producedT
d. Carbohydrate synthesis occursS
e. Carbon dioxideS
f. ATP used upS
g. Ribulose BisphosphateS
h. OxygenT
i. EnzymesBOTH
j. Cytochrome systemT
17. The cyclic electron pathway produces only ______.
ATP
18. Match the products to the participants of photosynthesis listed: chlorophyll, water, ATP, CO2
a. oxygen WATER
b. cytochromes ATP
c. RuBP CO2
d. sunlightCHLOROPHYLL
18. Which is not found in the Calvin cycle?
a. RuBP c. NADPH
b. CO2 d. ATP
e. oxygen
E
19. Briefly indicate the most significant function of the light reaction and the calvin cycle.
LR-MAKE ENERGY (ATP AND NADPH) CALVIN-MAKE FOOD
20. List the materials the plant uses during the Calvin cycle and the source of the materials.
CO2-STOMATA OF THE EPIDERMIS
ATP AND NADPH-THYLAKOID FROM LDR
21. What is the stroma, stomata, xylem, grana, thylakoid?
STROMA-GEL LIDR; STOMATA-PORE IN EPIDERMIS; XYLEM-VEIN DELIVER WATER; GRANA-STACK OF THYLAKOIDS; THYLAKOID-ABSORB LIGHT-LDR
22. What is the molecular difference between a chlorophyll A and B molecule?
A-CH3 B-ALDEHYDE
23. Why does photosystem II actually occur before photosystem I?
BASED ON ORDER OF DISCOVERY
24. What is the difference between ADP and ATP?
ADP-DI (2 PHOSPHATES) ATP-TRI (3 PHOSPHATES)
25. What happens to ATP once it gives energy? How does it become ATP again?
BECOMES ADP GAINS A PHOSPHATE
26. Another name for the calvin cycle______
LIGHT INDEPENDENT REACTION
27. What enzyme allows CO2 to combine with a 5-carbon sugar to form a 6-carbon sugar?
RUBSICO
28. Next the 6-carbon sugar breaks into ____ molecules of ______a 3-carbon sugar.
2 3-PHOSPHOGLYCERATE
29. PGA (3-phosphoglycerate) molecules are converted to ______.
1,3-BISPHOSPHOGLYCERATE
a. Total ATP used______b. Total NADPH used ______
9 6
30. Draw your own version of the electron transport chain in the light dependent rxn
31. Write the equation for photosynthesis and ID where the reactants are utilized and the products are made in the chloroplast.
WATER + SUNLIGHT + CARBON DIOXIDE -> GLUCOSE + OXYGEN
THYL THYL STROMA STROMA THYL