Lab 7

Question 1

Photosythesis formula

Answer 1

6CO2 + 6H2O + sunlight -> C6H12O6 + 6O2

Question 2

Why did we put sodium bicarbonate in the funnel?

Answer 2

to increase CO2 in the solution

Question 3

Photosynthetic pigments

Answer 3

Carotene, Xanthophyll, Chlorophyll a, Chlorophyll b

Question 4

Where does O2 come from in photosynthesis

Answer 4

H2O split by p680+ (strong oxidizer in P2)
in light dependent

Question 5

Where does glucose come from in photosynthesis

Answer 5

glucose does not come directly from photosynthesis
carbon fixation (CO2) in light independent

Question 6

Why did we breath into the phenol red?

Answer 6

it turns yellow in the presence of acid (CO2)
with elodea in solution, measure rate at which it takes up CO2

Question 7

Why did we boil the Coleus leaf in H2O then ethanol?

Answer 7

removes chlorophyll, then stained with iki to show starch

Question 8

Which reactants and products are created/used in light dependent/independent for photosynthesis

Answer 8

1. water - >light-dependent
2. carbon dioxide -> light-independent
3. oxygen -> light-dependent
4. Glucose - Light-independent

Question 9

What leaves did we use for the photosynthesis lab

Answer 9

spinach, elodea, and coleus