Photosynthesis: Light Dependant Reactions Flashcards
What is photosynthesis and what is the chemical equation
The process used by plants to produce glucose
6 CO2 + 6 H2O ——-> C6H12O6 + 6 O2
Carbon dioxide + water ——> glucose + oxygen
What are the three stages of photosynthesis
- Capturing light energy
- Using captured light energy to make ATP and NADPH
- Using ATP and NADPH to make glucose from CO2
Photosynthesis in the chloroplasts occur at the
Thylakoids (stacked discs)
Stroma (liquid like substance)
What is the function of chlorophyll a
Absorbs light energy from blue-violet and red spectrum of visible light
Only pigment that can transfer light to the reactions of photosynthesis
What is the functions of accessory pigments? Give an example
Capture light energy and transfer it to chlorophyll a
Assist in more efficient transfer of energy
Ex. Chlorophyll b absorbs blue-violet and red visible light
Where are accessory pigments located
In the antenna complex within photo system one and two
Chlorophyll a is the _________ of the ETC
Reaction centre
Stage one of light reactions is called
Photoexcitation
Photoexcitation does what
Absorbs energy in the photosystems
Photosystem 2 contains
Chlorophyll a P680
Photosystem 1 contains
Chlorophyll a P700
Stage 2 of light reactions is called
Electron transport
E- transport stage does what
Excited e- are transferred through series of compounds that reduce NADP to NADPH and pumps h+ into thylakoid space
What is stage 3 of light reactions called
Chemiosmosis
What does chemiosmosis do
H+ gradient is used to make ATP via ATP synthase
