Chapter 8: Photosynthesis

Question 1

Photosynthesis: Goal

Answer 1

• Capture light energy and store it in chemical bonds
  -Carbon Fixation: Convert inorganic carbon to organic carbon and Reduce CO2 to glucose

Question 2

Photosynthesis: Equation

Answer 2

CO2 + H2O (sunlight)—-> C6H12O6 + O2

Question 3

Chloroplast Anatomy

Answer 3

Outer Membrane, Intermembrane, Inner Membrane, Stroma, Granum, Thylakoid lumen,

Question 4

Two Stages of Photsynthesis

Answer 4

Light Dependent Reaction and Light Independent Reaction

Question 5

Light-dependent: Goal

Answer 5

Convert photo energy to chemical energy

Question 6

Light Dependent: Products and Reactants

Answer 6

Use sunlight and water to make ATP, NADPH (-e carriers), O2
Equation: H2O + Sunlight—–> O2+ATP+NADPH

Question 7

Light Dependent: Location

Answer 7

Occurs in the thylakoid membrane

Question 8

Light Energy, Photons, and Role of Pigments

Answer 8

Light Travels as Photon Waves
Certain pigments absorb certain wavelengths
Chlorophylls: reflect green, absorb blue and red
Carotenoids: Reflect yellow and red, absorb blue and green

Question 9

Photosystem II

Answer 9

-Creates ATP
- Protons and electrons come from the splitting of H2O
-Electrons excited by photons bind to an electron acceptor and then move along an electron transport chain
-Protons run back through ATP synthase to create ATP 1. Photophosphorylation or Chemiosmosis

Question 10

Photosystem 1

Answer 10

• Creates NADPH (electron carrier)
  -Electrons come from photosystem 2
• Electrons excited by photons bind to an electron acceptor (ferredoxin)
  NADP+ + H+ + 2e—–> NADPH

Question 11

Calvin Cycle: Goal

Answer 11

In order to convert inorganic carbon to organic carbon then to glucose

Question 12

Calvin Cycle: Products and reactants

Answer 12

Reactants: CO2, ATP, and NADPH
Products: Glyceraldehyde 3 phosphate, or G3P, ADP, and NADP+

Question 13

Calvin Cycle: Location

Answer 13

Stroma

Question 14

Calvin Cycle: Fixation

Answer 14

1. Combince three 5 carbon molecules (RuBP) with 3 CO2 molecules
2. Create six 3-carbon molecules (3PG)
3. Carbon fixation catalyzed by Rubisco (enzyme)
4. Inorganic carbon (CO2) to organic carbon: carbon fixation

Question 15

Reduction

Answer 15

-Uses ATP and NADPH from light-dependent reactions
-Reduce 3-carbon molecules (3PG) to higher energy molecules (G3P)
-One G3P removed every 3 cycles
1. Two G3P combined to make glucose

Question 16

Regeneration

Answer 16

-Remaining 5 G3P converted back to three 5 carbon RuBP
-Uses ATP to rearrange molecules
-Prepares cycle to run again