Biology Unit 2

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Across
  1. 2. A small molecule that reacts with a similar molecule to form a larger molecule.
  2. 4. The basic structural units of nucleic acids with a nitrogen-containing base, a five-carbon sugar, and a phosphate group.
  3. 8. The least possible amount of energy which is required to start a reaction.
  4. 10. Molecules that are long chains of lipid-carboxylic acid found in fats and oils.
  5. 11. Any of various complex organic acids that are composed of nucleotide chains.
  6. 16. The electromagnetic attraction between polar molecules in which hydrogen is bound to a larger atom.
Down
  1. 1. A substance that has amino acids, compounds and carbon, hydrogen, oxygen, nitrogen and sometimes sulfur and is found in many foods.
  2. 3. A substance that speeds up a chemical reaction.
  3. 5. Sugars, starches and fibers found in fruits, grains, vegetables, and dairy products.
  4. 6. The specific region of an enzyme where a chemical reaction occurs.
  5. 7. The most basic form of carbs.
  6. 9. A type of organic molecule found in living things. They are long chains of carbon and hydrogen molecules.
  7. 12. The building blocks of proteins.
  8. 13. The tendency of dissimilar particles or surfaces to cling to one another.
  9. 14. The tendency of similar or identical particles/surfaces to cling to one another.
  10. 15. Protein molecules in cells which work as biological catalysts. they speed up chemical reactions in the body, but do not get used up in the process.