Question

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Answer 1

Answer:

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A semi-permeable membrane is also called a selectively permeable memebrane or partially permeable membrane.

Answer 2

Answer:

Lipids are all made of carbon, hydrogen

and little oxygen and are water insoluble

but get dissolved in organic solvents like

ether, benzene, acetone etc. The lipids are

not polymers but they are assembled

from smaller molecules by dehydration.

Lipids could be simple fatty acids or

glycerol (which is trihydroxy propane).

Many lipids have both glycerol and fatty

acids. Some lipids have phosphorus and a

phosphorylated organic compound in

them. Some lipids have more complex

structures.