Basic Photosynthesis

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Photosynthesis is a chemical process that converts carbon dioxide and water, using sunlight into glucose and oxygen
carbon dioxide+water→ glucose+oxygen (sunlight and chlorophyll are needed but do not take part)
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> Photosynthesis takes place in the chloroplasts which contain chlorophyll and all enzymes necessary for photsynthesis
*chloroplast is the organelle, chlorophyll is the green pigment that absorbs sunlight
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The higher the light intensity, the faster photosynthesis occurs
To determine whether or not photosynthesis has taken place in experiments, we must first destarch the leaves we are experimenting on
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This makes it a fair test and ensures any starch present was made during the experiment
To test for presence of starch you: .
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1- dip the leaf in boiling water for a few minutes
This is to kill the leaf and stop reactions by breaking down the cell walls
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2- place the leaf in a boiling tube and cover with ethanol. Place in water bath at 80degrees celcius and bring ethanol to the boil
Ethanol should be boiling to increase the rate of reaction and allow the ethanol to dissolve into the leaf
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3- leave the leave in ethanol to remove green pigment (chlorophyll)
5- remove leaf and rinse to soften the leaf, then pllace in petri dish and cover with iodine.If it turns blue-black starch is present, it it stays orange-brown it is not
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Other cards in this set

Card 2

Front

*chloroplast is the organelle, chlorophyll is the green pigment that absorbs sunlight

Back

> Photosynthesis takes place in the chloroplasts which contain chlorophyll and all enzymes necessary for photsynthesis

Card 3

Front

To determine whether or not photosynthesis has taken place in experiments, we must first destarch the leaves we are experimenting on

Back

Preview of the back of card 3

Card 4

Front

To test for presence of starch you: .

Back

Preview of the back of card 4

Card 5

Front

This is to kill the leaf and stop reactions by breaking down the cell walls

Back

Preview of the back of card 5
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