5A: C3 Photosynthesis

Question 1

Inputs of Photosynthesis

Answer 1

Carbon Dioxide + Water

Question 2

Outputs of photosynthesis

Answer 2

Glucose + Water + Oxygen

Question 3

How do leaves contribute to photosynthesis

Answer 3

• Flat shape (Maximizes amount of sunlight captured)
• Stomata on leaves’ surface (Can prevent water loss by closing)
• Thin internal air spaces (Allows the ready diffusion of CO2 to the photosynthetic cells in the plant tissue)
• Each mesophyll has many chloroplasts (Maximizes the amount of light a leaf can capture)
• Chloroplasts contain chlorophyll (Chlorophyll captures light energy for the LDS)

Question 4

Names of the two stages of Photosynthesis

Answer 4

1. Light Dependent Stage (LDS)
2. Light Independent Stage (LIS)

Question 5

Light Dependent Stage

Answer 5

Where::
- Occurs in the grana

What:
- Sunlight is trapped by chlorophyll and converted into chemical energy in the form of ATP and NADPH (loaded coenzymes) to power the LIS

Question 6

Inputs of the LDS

Answer 6

12 H2O
18 ADP + Pi
12 NADP+

Question 7

Outputs of the LDS

Answer 7

6 O2
18 ATP
12 NADPH

Question 8

Light Independent Stage

Answer 8

Where::
- Occurs in the stroma

What:
- Sugar is created from CO2, with the help of NADPH and ATP by entering the Calvin Cycle

Question 9

Inputs of the LIS

Answer 9

6 CO2
12 NADPH
18 ATP

Question 10

Outputs of the LIS

Answer 10

C6H12O6
12 NADP+
18 ADP + Pi

Question 11

Steps of the Calvin Cycle

Answer 11

1. Carbon Fixation
2. Reduction
3. Regeneration

Question 12

How does NADPH and ATP help the Calvin Cycle

Answer 12

ATP gives the activation energy to catalyze the reactions in the Calvin Cycle.

NADPH donate their H+, electrons and reducing power to reduce CO2 and build it into Glucose

Question 13

Leaf -> Mesophyll cell-> Chloroplast -> Granum -> Thylakoid membranes -> Chlorophyll

Question 14

Balanced Overall Equation for Photosynthesis

Answer 14

6 CO2 + 12 H2O (Write light over the arrow) -> C6H12O6 + 6 O2 + 6 H2O