chapter 10- photosynthesis Flashcards
what does photosynthesis do
convert solar energy into chemical energy
what is a thylakoid
structure inside the chloroplast
what is in the thylakoid membrane
photosynthetic enzymes and other molecules like pigments (chlorophyll)
where are chloroplasts found and in what quantity
found in mesophyll cells and there are 30-40 in each
what is the stroma
the fluid inside the chloroplasts
what are the characteristics/structures of thylakoids
thylakoids are stacked in structures called grana
the interior thylakoid membranes form interconnected sacs
chlorophyll is present in the membranes and makes them green
photosynthesis formula
6co2 + 12h2o + E -> c6h12o6 +6o2 +6h2o
water is fully oxidized to what
oxygen gas
co2 is reduced to what
oxygen in water
oxygen in sugar
carbon in sugar
light as behaves as discrete particles called
photons
what is an absorption spectrum
a pigment’s light absorption vs wavelength
what is chlorophyll a’s absorption spectrum related to photosynthesis
suggests that violet-blue and red wavelengths work better
what is an action spectrum
shows the effects of different wavelengths on a process
what is the main photosynthetic pigment
chlorophyll a
absorbs better
what do chlorophyll b and carotenoids do light-wise
chlorophyll b broadens spectrum used for photosynthesis
carotenoids absorbs the excessive light that can damage chlorophyll
explain the excitation of chlorophyll by light
- pigment absorbs light and goes into excited/unstable state
- electrons fall back to ground state
- electrons can be released as photons of light or heat
photons of light are described as
fluorescence
what is a photosystem
a reaction-centre complex surrounded by light-harvesting complexes
donut is light-harvesting, hole is reaction centre