photosynthesis - light depentent

Question 1

what do plants capture from light energy and convert into something it can store

Answer 1

glucose

Question 2

what is a photoautotroph

Answer 2

an organism that can produce their own energy from sunlight - green plants, some bateria

Question 3

what do photoautotrophs use for metabolism

Answer 3

cellular respiration to produce ATP

Question 4

what is photosynthesis

Answer 4

a process used by plants to produce glucose and all other organic molecules

Question 5

what are the three things photosynthesis can be broken down into

Answer 5

• capture light energy
• using light energy to make ATP and NADPH
• using ATP and NADPH to produce glucose into CO2

Question 6

what is the structure of chloroplast

Answer 6

• inner and outer membrane
• thylakoids
• lumen
• grana
• stoma
• stroma lamellae

Question 7

what are thylakoids and grana

Answer 7

flattened sacks (surface area)
- stack of thylakoids

Question 8

what is lumen

Answer 8

fluid inside thylakoids

Question 9

what is a stroma lamellae

Answer 9

connects the thylakoids

Question 10

what is the stroma

Answer 10

fluid like substance outside of the thylakoids

Question 11

what is a plant pigment

Answer 11

any colour substance produced by a plant

Question 12

what happens when a pigment absorbs radiation

Answer 12

it is excited to a high energy state

Question 13

why do pigment molecules absorb some wavelengths and not others

Answer 13

its molecular structure restricts the energy states which it can enter

Question 14

what is chlorophyll a

Answer 14

a pigment in green plants that helps transfers light to energy

Question 15

what are accessory pigments

Answer 15

must give the light energy they have collected to chlorophyll a in order for the energy to be used in photosynthesis

Question 16

what is chlorophyll b

Answer 16

absorbs light in the blue-violet and red spectra of visible light

Question 17

what are carotenoids

Answer 17

absorbs light in the blue-violet spectra

Question 18

what is the first stage of capturing light

Answer 18

• light must hit the cluster of protein and pigments in the thylokoid membrane to begin the process
• photon of light excites a single electron moving it to the highest energy state

Question 19

what are the 3 options electrons have

Answer 19

• release energy as thermal energy
• transfers electrons to a different electron in neighboring pigment molecules
• electron is accepted by an electron-accepting molecule

Question 20

what is an antenna complex

Answer 20

the chlorophyll b and carotenoid tranfer energy to the reaction center - chlorophyll a

Question 21

what happens after energy hit chlorophyll a

Answer 21

an electron is released to the electron transport chain

Question 22

what is the light reaction responsible for

Answer 22

producing oxygen

Question 23

what are photosystems

Answer 23

clusters consisting of chlorophyll a, accessory pigments, and proteins in the membrane of thylakoids

Question 24

what are the two primary components and their functions in photoexcitation

Answer 24

antenna complex
- consists of accessory pigments
- responsible for collecting energy
reaction center
- contains chlorophyll a
- responsible for transmitting light energy in to the photosynthesis reaction

Question 25

draw the pathway for photo synthesis
(HINT IT HAS SOMETHING TO DO WITH THE PHOTOEXCITATION AND THE ETC)

Answer 25

check your phone bitch

Question 26

what are the 2 different types of photosystems

Answer 26

photosystem 1 - contains chlorophyll p700
photosystem 2 - contains chlorophyll p680

Question 27

explain the photoexcitation pathway

Answer 27

• energy from photon light are transferred through the photosystem until it reaches chlorophyll a
• chlorophyll a used energy to excite the electron
• the excited electron will be passed on through the reactions of photosynthesis (redox reaction)

Question 28

give a brief description of electron transport

Answer 28

• the excited electrons from chlorophyll a are transferred through a series of compounds that reduces NADP+ to NADPH and pumps H+ into the thylakoid space

Question 29

give a breif description of Chemiosmosis

Answer 29

the H+ gradient produced during e- transport is used to make ATP via ATP synthase (similar to the ETC in cellular respiration)