Unit 2 Vocabulary: Chemistry in Living Systems

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Across
  1. 2. two or more atoms held together by covalent bonds
  2. 4. A three dimensional polymer made of monomers of amino acids.
  3. 5. A long molecule consisting of many similar or identical monomers linked together.
  4. 6. Smallest particle of an element
  5. 8. substance formed by the chemical combination of two or more elements in definite proportions
  6. 9. A molecule that is a constituent of the inner bilayer of biological membranes, having a polar, hydrophilic head and a nonpolar, hydrophobic tail.
  7. 11. (adenosine triphosphate) main energy source that cells use for most of their work
  8. 13. the process by which one or more substances change to produce one or more different substances
  9. 15. the starches and sugars present in foods
  10. 16. A type of protein that speeds up a chemical reaction in a living thing
Down
  1. 1. A substance that cannot be broken down into simpler substances
  2. 3. A cell structure that controls which substances can enter or leave the cell.
  3. 7. building blocks of proteins
  4. 10. Compounds composed of only carbon and hydrogen
  5. 12. substance that speeds up the rate of a chemical reaction
  6. 14. An atom or group of atoms that has a positive or negative charge.