3.2 photosynthesis Flashcards
what is the absorption spectrum?
the light absorbed at each wavelength
what is the action spectrum?
rate of photosynthesis at each wavelength
how would you expect the Ph of the thylakoid to differ from the stroma?
. More acidic
. Higher H+ conc in thylakoid
Describe how glycerate-3-phosphate is converted to triose phosphate.
- glycerate 3 phosphate is reduced
- by reduced NaDPH
- Atp also required glycerate 3 phosphate is phosphorylated
- NaDPH and ATP are from light dependent reactions
what is the law of limiting factors?
process controlled by more than one factor and the final rate is controlled by the factor closest to its minimum value.
the main factors affecting rate of photosynthesis are:
- light intensity
- carbon dioxide concentration
- temperature
what does the graph for light intensity in photosynthesis look like?
it increases then plateaus
what does the graph for carbon dioxide conc look like in photosynthesis?
it increases then plateaus
what does the graph look like for temperature(hint enzymes) and why is it like that?
it increase then decreases (so u shaped)
this is because the enzymes denature which particularly affects the calvin cycle (light independent stage) as it is controlled by enzymes.
Plants take up minerals from the soil state these minerals and their functions:
nitrogen- nucleus acid synthesis or protein synthesis
magnesium- synthesis of chlorophyll
phosphate - synthesis of phospholipids
adaptations of leaf: transparent cuticle
let’s light through to lower cells
adaptation of leaf: upper epidermis
made of thin flat transparent cells to allow light to penetrate through
adaptation of leaf: stomata
allow exchange of gases as they open and close in response to light intensity
adaptation of leaf: palisade mesophyll cells
long cylindrical cells
adaptation of leaf: large SA
collect as much sunlight
