Biology

1. The number of protons contained in the nucleus. (6, 6)
4. A long chain of repeating monomer units. (7)
5. A liquid in which a solute is dissolved to form a solution. (7)
6. A bond formed by a shared pair of electrons. (8)
7. Compounds that have the same chemical formula but which differ in the arrangement of the atoms. (7)
8. A substance which acts as a base and an acid in order to maintain the pH of a solution. (6, 8)

2. A substance formed in or necessary for metabolism. (10)
3. The number of protons plus the number of neutrons contained in the nucleus. (4, 6)
9. A bond formed by an oxygen bridge i.e. between glycerol and fatty acids. (5)
10. Something with the tendency to interact with water. (11)

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