Biology Unit 2 Vocab

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Across
  1. 2. biological catalysts
  2. 4. particle found in the nucleus that has no charge
  3. 7. a reaction that releases energy (gives off heat)
  4. 11. one- or two-letter abbreviation for a chemical element name
  5. 12. macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
  6. 14. reactant of an enzyme-catalyzed reaction
  7. 15. positively charged particle found in the nucleus of an atom
  8. 16. macromolecule made mostly from carbon and hydrogen atoms; includes fats, oils, and waxes
  9. 20. subunit of which nucleic acids are composed; made up of a 5-carbon sugar, a phosphate group, and a nitrogenous base
  10. 21. compound made up of carbon, hydrogen, and oxygen atoms; type of nutrient that is the major source of energy for the body
  11. 23. small chemical unit that makes up a polymer
  12. 25. type of bond between atoms in which the electrons are shared
  13. 26. compound with an amino group on one end and a carboxyl group on the other end
  14. 28. pure substance that consists entirely of one type of atom
  15. 29. substance formed as a result of a chemical reaction
Down
  1. 1. energy that is needed to get a reaction started
  2. 2. a reaction that absorbs energy (absorbs heat)
  3. 3. the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table (also equals the number of electrons in an element)
  4. 5. negatively charged particle that orbits the nucleus in the electron cloud
  5. 6. substance that speeds up the rate of a chemical reaction
  6. 8. electron found in the outermost shell of an atom; helps to determine bonding
  7. 9. process that changes, or transforms, one set of chemicals into another set of chemicals
  8. 10. (chemistry definition) the center of an atom, which contains the protons and neutrons
  9. 13. a combination of 2 or more elements connected by bonds
  10. 17. macromolecule made up of amino acids
  11. 18. a large organic molecule made up of many atoms (like proteins)
  12. 19. the basic unit of matter
  13. 22. elements or compounds that enter into a chemical reaction
  14. 24. molecules composed of many monomers; makes up macromolecules
  15. 27. equal to the total number of protons and neutrons in the nucleus of an atom (based on isotopes)