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Biology Year 2 (Topic 5-Energy for biological Processes (Photosynthesis…
Biology Year 2
Topic 5-Energy for biological Processes
Photosynthesis
This is a process by which organisms produce organic 'food' from inorganic sources such as water and CO2 These organisms are Autotrophic
Takes place in chloroplasts
Outer membrane
Inner membrane
chloroplast envelope
Contains
grana
Contains thylakoids
Contains chlorophyll
These are arranged on the membranes of the granum and lamellae
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This is a mixture of closely related pigments
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connected together by Lamellae
The majority of the area within is the stroma
Cytoplasm of Chloroplasts
Contains Enzymes
These are needed in Photosynthesis
Spectrum's
Action
rate of photosynthesis against different wavelengths of light
Absorption
amount of each wavelength of light a pigment absorbs
You can compare the data on these graphs to rate of photosynthesis
Chromatography
used to separate out all the different pigments within chlorophyll
they can be identified
Using Rf value
Rf=distance traveled by pigment/distance traveled by solvent
Method
collect a sample of leaves
grind them up in propanone
add dots of the liquid to chromatography paper on the pencil line
add 15 drops to make it conentrated
add a special solvent to the paper
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using a capillary tube
use a hair dry to remove excess water
using a mortar and pestle