U2L1E3 Chemical Reaction

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Across
  1. 3. The process that happens when substances change into new ones.
  2. 5. SITE The place on an enzyme where a substrate fits.
  3. 7. The type of energy often released or absorbed during reactions.
  4. 12. — A reaction that absorbs more energy than it releases.
  5. 13. A protein that speeds up chemical reactions in living things.
  6. 14. Symbol used to describe the enzyme in the lock-and-key model.
Down
  1. 1. When an enzyme changes its shape and can’t work anymore.
  2. 2. The special molecule that an enzyme acts on.
  3. 4. A helper that speeds up reactions without being used up.
  4. 6. — A reaction that gives off more energy than it absorbs.
  5. 8. ENERGY — The energy needed to break a chemical bond.
  6. 9. Needed to start reactions and released when bonds form.
  7. 10. AND KEY The model showing how substrates fit perfectly into enzymes.
  8. 11. The reason enzymes only fit certain substrates.