Photosynthesis

Question 1

what is photosynthesis

Answer 1

the conversion of light energy by CO2 and converting to energy

Question 2

autotrophs

Answer 2

self feeding organisms; they produce their own energy and do not have to go to other organism for energy

Question 3

phototrophs

Answer 3

self feeding by use of light energy
IE: plants

Question 4

Heterotrophs

Answer 4

organisms that go to other organisms for energy
IE: humans

Question 5

chemotrophs

Answer 5

organisms that obtain their energy through the oxidation of inorganic molecules, such as iron and magnesium.

Question 6

Photosynthesis equation

Answer 6

6CO2 + 12H20 + light energy –> C6H12O2 + 6O2 + 6H2O

Question 7

Splitting water

Answer 7

a type of hydrolysis, taking place in chlorophyl pigment and produces oxygen as a waste produce

Question 8

chloroplast

Answer 8

organelles of a plant found in the mesophyll and are the cites of photosynthesis

Question 9

chlorophyll

Answer 9

give plants green pigment, required to carryout photosynthesis and found in granum

Question 10

Stomata

Answer 10

they open and close so that CO2 can enter and O2 can exit. Gascious exchange. Regulate water exchange through the release of water vapour.

Question 11

thylakoid

Answer 11

flatten disk

Question 12

granum

Answer 12

singular stack of thylakoids

Question 13

grana

Answer 13

stacks of flatten disk

Question 14

stroma

Answer 14

similar to cytoplasm

Question 15

photosynthesis reactants

Answer 15

6CO2 + 12H2O

Question 16

photosynthesis products

Answer 16

6CH12O6 + 6H2O + 6O2

Question 17

First stage of photosynthesis (light cycle)

Answer 17

Light reaction occurs in thylakoids. Splitting of water takes place. NADP+ reduces to NADPH and generates ATP from ADP by the process of photophosphorylation. Also releases CO2

Question 18

Second stage of photosynthesis (calvin cycle)

Answer 18

Occurs in the stroma. When sugar is formed from CO2. The ATP and NADPH from the light cycle get fed into the calvin cycle to make sugar.
- NADPH is the higher electron carrier

Question 19

Light is a form of electromagnetic energy, also called

Answer 19

electromagnetic radiation. Like other electromagnetic energy, light travels in rythmic waves

Question 20

Wavelength is

Answer 20

the distance between crests of waves. it determines the type of electromagnetic energy

Question 21

The electromagnetic spectrum is the

Answer 21

entire range of electromagnetic energy or radiation

Question 22

Visible light consist of

Answer 22

wavelengths that produce colors we can see

Question 23

Light also behaves as though it consist of discrete particles called

Answer 23

photons

Question 24

pigments are

Answer 24

substances that absorb visible light

Question 25

The color visible to the eye

Answer 25

is the color that is being reflected off the object

Question 26

objects and substances absorb

Answer 26

pigments

Question 27

red, blue, and violet are useful for

Answer 27

photosynthesis

Question 28

chlorophyll a

Answer 28

main photosynthetic pigment, forest green in color

Question 29

chlorophyll b

Answer 29

accessory pigments, show up as lime green

Question 30

carotenoids

Answer 30

don't do much photosynthesis, absorb all the extra light, like a protector, all the other light would be harmful to the chlorophyll, usually orange or yellow

Question 31

electrons go from a ground state to

Answer 31

an excited (exitation) state, unstable

Question 32

photosystem

Answer 32

embeded in the thylakoid membrane

Question 33

reaction center

Answer 33

accepts the sunlighht

Question 34

primary electron center

Answer 34

final absorption of electrons

Question 35

light harvesting complexes surround the

Answer 35

reaction center complex, which have a special pair of chlorophyll a molecules

Question 36

What happens in the photosystems

Answer 36

1 - photons hit the light harvesting complexes 2 - it exits the molecules bumping energy from one chlorophyll to another 3 - then the energy is transffered to one of the special chlorophyl a pair 4 - then that chlorophyl is oxidized 5 - the electron is then absorbed by the primary electron acceptor

Question 37

photosystem II

Answer 37

functions first and is best at absorbing a wavelength of 680nm. the reaction center chlorophyll a of PS II is called P680

Question 38

photosystem I

Answer 38

is best at absorbing a wavelength of 700nm. The reaction center chlorophyll of PS I is called P700

Question 39

From photosystem II 2 electrons fall down the

Answer 39

Electron transport chain to photosystem I. Then the electrons go to NADP+ and the electron make NADPH.

Question 40

NADP+ is the final

Answer 40

electron acceptor

Question 41

The splitting of water provides

Answer 41

the electrons

Question 42

Cyclic electron flow is the absence of

Answer 42

photosystem II

Question 43

Cyclic electron flow produces

Answer 43

a surpless of ATP, alternative pathway, dont not generate NADPH, and there is no splitting of water.