The cell membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer.

Explanation:

8 0

2 years ago

How would you test the presence of starch in leaves?

Lesechka [4]

Answer:

1. Remove a green leaf from the plant

2. Boil the leaf in boiling water stop enzymatic reaction within cells in leaf

3. Put the boiled leaf in boiling tube containing alcohol extract (ethanol) chlorophyll ethanol dissolves Lipids in cell membranes.

4. Return to leave to the hot water soften the leaf and allows penetration of iodine

5. Remove leaf and perform the iodine test

Explanation:

starch is white powdery substance consisting of glucose which is used by plants as food the percents of starch in leaves evidence enough of the process a photosynthesis being carried out in leaves as the formation of starch necessitates photosynthesis.

I hope this helps :)

4 0

4 years ago