photosynthesis Flashcards
Describe what happens during photoionisation in the light-dependent
reaction.
Light excites/moves electrons in chlorophyll;
Electron/s are lost as they go to ETC
Explain why the student marked the origin using a pencil rather than using
ink.
Ink and (leaf) pigments would mix
Describe the method the student used to separate the pigments after the
solution of pigments had been applied to the origin.
Level of solvent below origin/line;
remove once solvent reaches end
The pigments in leaves are different colours. Suggest and explain the
advantage of having different coloured pigments in leaves.
different pigments absorb different wave lengths FOR photosynthesis
A decrease in the activity of the enzyme rubisco would limit the rate of
photosynthesis.
Explain why.
less canon dioxide reacts with RUBP so less GP is produced and reduced so less TP
why does chloroplast suspension
had the same water potential as the chloroplasts
- osmosis does not occur
- chloroplast does not burst or shrink as water potential not affected
In natural ecosystems of , most of the light falling on producers is not used in
photosynthesis
- light is reflected and wrong wavelength
no
definite conclusions could be drawn when comparing the mean values in
the graph.
- no standard deviation to test if it is significant
