Light dependent stage

what is photosynthesis?

uses the sun's energy to convert inorganic substances into complex organic molecules, which can be used as a source of energy

what is an example of photoautrophic nutrition?

photosynthesis

what is the photosynthesis equation?

6CO2 + 6H20 → C6H12O6 + 6O2

what do we need for photosynthesis to occur?

• sunlight

• chlorophyll

what is the glucose created in photosynthesis then used for?

• used in respiration to create energy

what are the 2 different types of chlorophyll a?

• P680 (peak absorption at 680 nm)

• P700 (peak absorption at 700nm)

what are photosynthetic pigments?

pigments that are specialised light absorbing chemicals that capture energy from sunlight and drive photosynthesis

what varies between photosynthetic pigments?

vary in wavelengths of light they can absorb

what is the primary pigment in photosynthesis?

chlorophyll a

what are the other pigments in photosynthesis called?

accessory pigments

what are some examples of accessory pigments?

• chlorophyll b

• carotene

what is different about accessory pigments from the primary pigment?

• they absorb light of different wavelengths and pass its energy to chlorophyll a

where are photosynthetic pigments found?

• embedded into thylakoid membranes in funnel shaped structures called photosystems

how can photosynthetic pigments be separated?

• using chromatography

• Rf values can be used to identify the pigments

what does a photosystem look like?

how many stages of photosynthesis is there? what are the names of them?

2 stages:

1. light dependent stage/photophosphorylation

2. light independent stage/Calvin cycle

where does the light dependant stage happen?

thylakoid membranes

where does the Calvin cycle happen?

stroma