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Chemical Basis For Life
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Chemical Basis For Life
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25 Questions

1. Any ionic copmound composed of positively charged cations and negatively charged anions so that the product is electrically neutral.

2. This minor element is an important positive ion in extracellular fluid and is important in nerve funciton.

3. XY >> X + Y

4. Fatty acids in which not all chemical binding sites of the molecules are filled with hydrogen; contain one or more double bonds and are liquid at room temperature. Usually plant in origin.

5. The tendency of a tissue to be repelled by water or to be insoluble; water- fearing.

6. A process that results in the creation of new chemicals involving changes in the movement of electrons in forming and breaking chemical bonds.

7. A substance that minimizes the change of the acidity of a solution when an acid or base is added to the solution.

8. Substances that dissolve in water to yield hydrogen ions and produce a solution with a pH less than 7.

9. The minimum energy required for a chemical reaction to occur.

10. This minor element is the principal - positive ion within cells and is important in nerve function.

11. Subatomic particles with a positive charge that - along with neutrons - make up the entire mass of the nucleus; number of these defines the atomic number.

12. A symbolic representation of a chemical reaction. Arrows are used to denote in which direction the reaction is occurring. Chemical symbols are used to denote the reactants and products of the reaction.

13. The combination of phosphoric acid - pentose sugars - and pyrimidine or purine bases that make up nucleic acids.

14. Substance that induces chemical reactions by lowering the activation energy needed; e.g. - heat - enzymes.

15. Substances initially involved in a chemical reaction.

16. A dense region at the center of an atom consisting of positively charged protons and uncharged neutrons.

17. An eicosanoid produced by platelets that causes vasoconstriction and promotes the clumping of platelets.

18. Any of a group of substances derived from 20- carbon unsaturated fatty acids - such as arachidonic acid; includes prostaglandins - leukotrienes - and thromboxanes. They are the principle mediators of inflammation.

19. The new substance created by the interaction of two or more chemical substances.

20. Chemical bonds in which electrons are shared.

21. An eicosanoid formed from the activation of white blood cells; act to sustain inflammation in asthmatic and allergic reactions.

22. A simple sugar - such as glucose or fructose - that has six carbon atoms per molecule.

23. Substance acted on by an enzyme.

24. The grouping of electrons around the nucleus of an atom; the electrons in the outer level are responsible for chemical reactions.

25. Anything that has mass and exists as a solid - liquid or gas.

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