Photosynthesis

Question 1

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

Answer 1

Endergonic, releases energy

Question 2

What are the inputs to the light reactions?
Matter:
Energy/energy management molecules:

Answer 2

H2O
Light, ADP, NADP+

Question 3

What are the products (outputs) of the light reactions?
Matter:
Energy/energy management molecules:

Answer 3

O2
ATP, NADPH

Question 4

What are the inputs to the Calvin cycle?

Answer 4

ATP, NADPH

Question 5

What are the products (outputs) of the Calvin cycle?
Matter:
Energy/energy management molecules:

Answer 5

Triose Phosphate (ex: G3P)
ADP, NADP+

Question 6

Light-harvesting complex / photosystems (two functions):
1.
2.

Answer 6

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

Question 7

Chlorophyll:

Answer 7

Pigment molecule in the photosystem that is excited by light

Question 8

Cytosol: (two functions):
1.
2.

Answer 8

Electron transport protein
Proton pump

Question 8

NADP+:

Answer 8

Ultimate electron acceptor in the photosynthetic electron transport
chain

Question 8

ATP Synthase (two functions):
1.
2.

Answer 8

Contains a proton channel
Synthesizes ATP from ADP + Pi

Question 9

Number the reactions in each of the stages of the Calvin cycle
__. Reduction: ATP and NADPH are used to reduce PGA to G3P
__. Carbon fixation: CO2 is attached to RuBP by the enzyme Rubisco
__. Regeneration: ATP is used to transform G3P in RuBP to start the
cycle again

Answer 9

2, 1, 3

Question 10

List the 3 net inputs required for photosynthesis:

Answer 10

Light, H2O, CO2

Question 11

What organelle generates the glucose shown in the cytosol of the plant cell?

Answer 11

The chloroplast generates the glucose shown in the cytosol of the plant cell.

Question 12

By what process and where is pyruvate generated in the cell?

Answer 12

Pyruvate is generated from glucose by the process of glycolysis, occurring in the cytosol.

Question 13

What can the cell do with pyruvate once it is generated?

Answer 13

Pyruvate is imported into the mitochondrial matrix to continue the process of cellular respiration and produce ATP for the cell.

Question 14

What process occurring in the cytosol generates ATP?

Answer 14

In the cytosol, the later stages of glycolysis produce ATP as glucose is oxidized to pyruvate.

Question 15

What two processes occurring in the cytosol require ATP?

Answer 15

In the cytosol, the unfavorable process of cellulose synthesis (and other synthesis reactions) and the initial reactions of glycolysis require ATP as an energy source.