basic chemistry

3. What is the 5th element needed to build proteins?
5. found as a salt in bones and teeth
6. the most abundant extracellular anion
7. include sugars and starches, contain carbon, hydrogen, and oxygen
9. a major component of both organic and inorganic molecules and is essential during cellular respiration
10. has the general structures of triglycerides, phospholipids, and steroids
13. Atoms that have gained or lost electrons are called __
14. as an ion, it influences the pH of body fluids
16. the two major types of __ are DNA and RNA
18. is necessary to carry O2 in the red blood cells?
19. only present in proteins and not in carbohydrates and lipids.

1. Present as a salt, in combination with calcium, in bones and teeth
2. The building blocks of proteins are small molecules called __
4. anything that occupies space and has mass
6. __ chains form the skeletons of most organic molecules
8. essential to the oxidation of glucose and other food fuels, during which cellular energy (ATP) is produced
11. important for water balance, conduction of nerve impulses, and muscle contraction
12. Present in bone
15. __ is Needed to make functional thyroid hormones
17. greek word meaning “incapable of being divided”