The hair of sheep is sheared and processed into
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Explain why phospholipid molecules form a bilayer. (3 marks)

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.

20 the compound al(nh3)2 has atoms of nitrogen.