Photosythesis

Question 1

What is the equation for photosynthesis?

Answer 1

6CO_2 + 6H2O (sunlight) C6H1206 + 6O_2

Question 2

What are the products of photosynthesis?

Answer 2

glucose (used in respiration/stored as starch), oxygen (released as a waste product)

Question 3

what are the wavelengths for light?

Answer 3

blue = 450-500 nm
green = 525-575 nm
red = 650-700 nm

Question 4

what pigment absorbs light in plants?

Answer 4

chlorophyll

Question 5

why do plants appear green?

Answer 5

chlorophyll, the pigment in plants, absorbs green light the least. the green light is reflected, making the plant appear green.

Question 6

what are pigments?

Answer 6

pigments are the substances that absorb light

Question 7

what is the action spectrum?

Answer 7

the action spectrum shows the range of wavelengths of light which can be used in light-dependent reactions (shows photosynthesis rate)

Question 8

what is the absorption spectrum?

Answer 8

the absorption spectrum shows the range of wavelengths of light that are absorbed by chlorophyll

Question 9

what is photolysis?

Answer 9

photolysis is the splitting of water that produces electrons

Question 10

what are limiting factors to photosynthesis?

Answer 10

temperature, light intensity, and co2 concentration

Question 11

how can you measure photosynthesis rate?

Answer 11

measuring co2 input, oxygen output, and change in biomass

Question 12

where do light dependent reactions take place?

Answer 12

in the intermembrane space of the thylakoid

Question 13

what do light dependent reactions involve?

Answer 13

photolysis and photophosphorylation. the reactants are h2o, nadp+, and adp. the products are o2, nadph, and atp

Question 14

where do light independent reactions take place?

Answer 14

in the stroma

Question 15

what do light independent reactions involve?

Answer 15

carbon fixation, the calvin cycle, and the synthesis of carbohydrates. reactants are co2, nadph, and atp. products are glucose phosphate, nadp+, and adp

Question 16

what is carbon fixation?

Answer 16

when ruBP is carboxylated with co2 and catalyzed by rubisco

Question 17

how are nadp and atp reduced?

Answer 17

by ld reactions. atp is used as energy and nadph provides the hydrogen to reduce G3P to triose phosphate

Question 18

what is triose phosphate used for?

Answer 18

regenerate ruBP, create glucose,

Question 19

what are the three stages of the calvin cycle

Answer 19

carbon fixation, reducation, and regeneration of ruBP

Question 20

what is the relationship between chloroplast structure and function?`

Answer 20

the thylakoid membrane has a large surface area forlight absorption, folds allow photosystems and electron carriers to be close together.

Question 21

what is chemiosmosis?

Answer 21

the generation of atp by the movement of hydrogen ions across a membane.

Question 22

what is the proton gradient?

Answer 22

generated from excited protons from ps2.

Question 23

what is photoactivation?

Answer 23

the absorptio of light, creating excited electrons