Biology Review

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Across
  1. 2. Bases form the rungs of a DNA molecule
  2. 5. a baglike, muscular organ that mixes and chemically changes protein
  3. 10. ______ system is a group of organs that take in food and change it into a form the body can use
  4. 11. ______ twins are twins that form from two different fertilized egg
  5. 15. a tubelike organ at the end of the digestive track
  6. 17. three pairs of small glands located under the tongue and behind the jaw
  7. 19. a tube hat connects the mouth to the stomach
  8. 20. a molecule that makes up genes and determines the traits of all living things
  9. 22. energy that is given off by atoms
  10. 23. makes three different enzymes
  11. 24. ______ twins are two children that form from the splitting of one fertilized egg
  12. 25. A ______ occurs when large food pieces are broken down into smaller pieces
  13. 26. a green liquid that breaks large fat droplets into small fat droplets
  14. 27. the DNA that is formed when DNA from one organism is put into the DNA of another organism
  15. 28. the bringing together of two living things to produce offspring
  16. 29. the changing of food into a usable form
  17. 30. chemicals that speed up the rate of chemical change
Down
  1. 1. Food gets out of the small intestine and into the blood mainly by ______
  2. 3. the fingerlike parts on the lining of the small intestine
  3. 4. the largest organ in the body
  4. 5. a liquid that is formed in the mouth and that contains an enzyme. (speeds up chemical change in carbohydrates)
  5. 6. a thick, sticky material that protects the stomach and intestinal linings from from enzymes and stomach acid
  6. 7. a chemical often called stomach acid
  7. 8. the code that translates the DNA language into the protein language
  8. 9. a small, baglike part located under the liver
  9. 12. a long, hollow, tubelike oran (most of chemical digestion of food take place here)
  10. 13. A ______ turns food into a form the cells can use
  11. 14. the adding of a healthy gene into the body of a person suffering from a disorder caused by a defective or mutated gene
  12. 16. a chemical that acts as a messenger for DNA
  13. 18. any change in copying the DNA message
  14. 21. a small fingerlike part found where the small and large intestine meet