14

Question 1

Metabolic principles:
Without coupling, the synthesis of sugars is exergonic / endergonic and requires energy / releases energy

Answer 1

Endergonic, requires energy

Question 2

Metabolic principles:
What is the ultimate source of energy for photosynthesis?

Answer 2

Sunlight

Question 3

Metabolic principles:
What are the inputs to the light reactions?
i. Matter:
ii. Energy/energy management molecules:

Answer 3

H2O,
Light, ADP, NADP+

Question 4

Metabolic principles:
What are the products (outputs) of the light reactions?
i. Matter:
ii. Energy/energy management molecules:

Answer 4

O2
ATP, NADPH

Question 5

Metabolic principles:
Which of the above are inputs to the Calvin cycle?

Answer 5

ATP, NADPH

Question 6

Metabolic principles:
f. What are the products (outputs) of the Calvin cycle?
i. Matter:
ii. Energy/energy management molecules:

Answer 6

Triose phosphate (ex: G3P)
ADP, NADP+

Question 7

Describe the role of the each of the following in the light reactions:
- Light-harvesting complex / photosystems (two functions):
1.
2.

Answer 7

Contains chlorophyll to captures light energy, Electron transport protein in the photosynthetic electron transport
chain

Question 8

Describe the role of the each of the following in the light reactions:
- Chlorophyll:

Answer 8

Pigment molecule in the photosystem that is excited by light energy

Question 9

Describe the role of the each of the following in the light reactions:
- H2O:

Answer 9

Is oxidized to provide electrons to chlorophyll in photosystem II (ultimate electron donor in the photosynthetic electron transport chain)

Question 10

Describe the role of the each of the following in the light reactions:
- Cyt: (two functions):
1.
2.

Answer 10

Electron transport chain protein - passes electrons to PSI, Proton pump

Question 11

Describe the role of the each of the following in the light reactions:
- NADP+ reductase:

Answer 11

ultimate electron acceptor in the photosynthetic electron transport chain

Question 12

Describe the role of the each of the following in the light reactions:
- ATP Synthase (two functions):
1.
2.

Answer 12

Contains a proton channel, Synthesizes ATP from ADP + Pi

Question 13

Reactions of three stages of the Calvin cycle
1. Carbon fixation:
2. Reduction:
3. Regeneration:

Answer 13

CO2 is attached to RuBP by the enzyme Rubisco, ATP and NADPH are used to reduce PGA to G3P, ATP is used to transform G3P in RuBP to start the
cycle again

Question 14

Calvin cycle details:
Glucose is NOT a direct output of photosynthesis, but it is produced using the outputs of photosynthesis.
1. From what molecule did the plant obtain the carbon atoms to build this molecule?
2. From what molecule did the plant obtain the oxygen atoms to build the glucose molecule?

Answer 14

CO2

Question 15

Connections within a plant cell:
What other molecules can be made with the G3P produced by the Calvin cycle?

Answer 15

Glucose to produce polysaccharides (starch and cellulose), pyruvate to produce monomers for nucleic acids, proteins, carbohydrates, lipids

Question 16

Electron cycling
1. Water > _______

Answer 16

Chlorophyll

Question 17

Electron cycling
2. Chlorophyll > ________

Answer 17

NADP+/NADPH

Question 18

Electron cycling
3. NADP+/NADPH > ________

Answer 18

Carbon dioxide/glucose

Question 19

Electron cycling
4. Carbon dioxide/glucose > ________

Answer 19

NAD+/NADH

Question 20

Electron cycling
5. NAD+/NADH > ________

Answer 20

Oxygen/Water