Basic chemistry

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Across
  1. 3. A sequence of amino acids linked together to form a polypeptide.
  2. 7. The four primary elements in the body are hydrogen, oxygen, and ___.
  3. 8. Which of the 4 minor elements matches these 4 functions? The most abundant extracellular anion; Present in the bone; Is needed to make functional thyroid hormones; Transport oxygen within red blood cells.
  4. 9. What two elements form salts to strengthen teeth and bones? Write their chemical symbol.
  5. 10. Atoms that lose or gain electrons are converted into ___.
Down
  1. 1. Phospholipids, steroids, and triglycerides are the three main types of this compound.
  2. 2. Provides a used source of food energy for cells.
  3. 4. The two major types of this compound: DNA encodes the information cells need to make proteins and RNA carries genetic information that translates into proteins by ribosomes.
  4. 5. Other than calcium, what other two elements are required for muscle contraction? Write their chemical symbol.
  5. 6. The 5th element needed to build proteins.