Photosynthesis - The process by which plants manufacture carbohydrates from raw materials (co2 and water) using (converted chemical) energy from light.
Chlorophyll - Green pigment found in chloroplasts → converts light energy into chemical energy
Products Of Photosynthesis [USES] -
The carbohydrates can be used for:
- Starch - Energy store
- Cellulose - Cell wall
- glucose- Used in respiration - energy
- Sucrose - Transportation
Minerals [USES] -
| Ion - |
Use - |
Deficiency - |
| Magnesium |
Make chlorophyl |
Yellowing between veins [Chlorosis] |
| Nitrogen |
Make amino acids [proteins] |
Stunted growth and yellow leaves |
Tests [Chlorophyll, Light, CO2] -
Starch Test -
- leaf → beaker of boiling water [Break down cell walls]
- Leaf → ethanol test tube → boiling water bath [Chlorophyll is soluble in ethanol, removing all the green pigment and allowing for visible colour change]
- wash the leaf in cold water to remove ethanol
- Spread out leaf and drop iodine solution [Turns blue = Starch present, Remains orange-brown = No starch]
Testing The Necessity Of Light -