photosynthesis and light reactions Flashcards
photosynthesis converts
light energy to chemical energy
site of photosynthesis
photosynthesis
Chloroplast location:
highest concentration is in leaves , especially in mesophyll (inner leaf)
__ lets air into the leaf
stomata
light reactions….
a. Capture light energy
b. Removes electrons from water
c. Energize electrons
d. Create ATP
Most abundant electromagnetic energy on earth
electromagnetic energy
visible light: energy is carried in
photons
pigment
molecule that interacts with visible light
Photosynthetic pigments absorb
light energy (but not all wavelengths equally)
types of photosynthetic pigments
o Chlorophyll is most common
o Carotenoids
what colors does chlorophyll absorb?
blue and red which are high energy
w
what colors does carotenoids absorb?
blue red and green
photosystems:
oPigments are organized into light harvesting complexes
Harvest light over a larger area
oExcited electrons passed to light harvesting complex
oElectrons absorbed by primary electron acceptor
two variations of photosystems
- Photosystem 2 (comes before photosystem 1
- Photosystem 1