Section 2-3: Photosynthesis

Question 1

where does photosynthesis take place?

Answer 1

in the chloroplast

Question 2

how many membranes does a chloroplast have?

Answer 2

3: outer, inner, and thylakoid

Question 3

how many spaces are in a chloroplast?

Answer 3

3: intermembrane, stroma, lumen

Question 4

2 pigment molecules, what color light do they absorb and reflect?

Answer 4

chlorophylls: absorbs blue and red, reflects green
carotenoids: absorbs blue-green light, reflects orange/red

Question 5

light absorption excites chlorophyll molecules releasing energy as…

Answer 5

1. heat
2. fluorescence
3. resonance energy transfer to adjacent pigment molecules (most important for photosynthesis)

Question 6

where do the steps of light absorption occur?

Answer 6

1. light absorption by photosystems II + I, pigment proteins in thylakoid
2. resonance energy transfer, in antenna complex
3. splitting water, at reaction center

Question 7

3 steps of electron transport chain

Answer 7

1. e- produced from PSII light absorption
2. H+ active transport uses energy to form electrochemical gradient
3. high energy e- produced from PSI light absorption, carried by NADPH

Question 8

ATP synthase 2 steps

Answer 8

1. ATP synthase complex moves H+ from thylakoid lumen to stroma
2. produces ATP

Question 9

electron transport chain and ATP synthase are both

Answer 9

light reactions

Question 10

carbon fixation

Answer 10

calvin cycle (metabolic pathway)
light independent reaction

Question 11

carbon fixation uses and produces

Answer 11

uses NADPH, ATP, and CO2 (substrate)
produces C3 (product)
low energy substrate to high energy product

Question 12

where does carbon fixation occur?

Answer 12

stroma

Question 13

RuBisCO

Answer 13

catalyzes carbon fixation reaction

Question 14

draw process of photosynthesis in the chloroplast and respiration in the mitochondria