Intro/Chemistry of Life
Supplemental Instruction
Iowa State University / Leader: / Caleb I.
Course: / BIOL 212
Instructor: / Dr. Kukday
Date: / 1/17/2017

1.)Vocabulary Review- Match the Terms & Definitions:

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  1. Proton ______
  2. Neutron ______
  3. Electron ______
  4. Period ______
  5. Group ______
  6. Electronegativity ______
  7. Covalent ______
  8. Ionic ______
  9. Hydrogen ______
  10. Adhesion ______
  11. Cohesion ______
  12. Hydrophilic ______
  13. Hydrophobic ______
  14. Amphipathic ______
  15. Micelle ______
  16. Acid ______
  17. Base ______
  18. pH ______
  19. Buffer ______
  1. A solution that increases the concentration of H+
  2. Term used to describe water’s ability to stick to other objects
  3. This type of bond is found between atoms in an H2O molecule
  4. A solution that decreases the concentration of H+
  5. A vertical section on the periodic table
  6. A horizontal section on the Periodic Table.
  7. The positively charged parts of an atom
  8. This type of bond is found in solid NaCl
  9. The negatively charged parts of an atom
  10. This is used to slow changes in pH in a solution
  11. The neutral parts of an atom
  12. This term describes an element’s tendency to attract an electron
  13. A substance that is nonpolar could also be described as…
  14. A substance that is polar could also be described as…
  15. These allow soap to remove grease when mixed with water.
  16. Term used when a something is both hydrophilic and hydrophobic
  17. A measure of the concentration of hydrogen atoms in solution
  18. Term used to describe water’s ability to stick to itself
  19. This type of bond is observed between separate water molecules in solution

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2.)Fill in the Blanks Below:

  1. pH= (equation)
  2. have a high pH and have a low pH.
  3. A neutral solution will have a pH of ______. A common substance with this pH level is ______
  4. ______numbers on the periodic table refer to the number of electron shells.
  5. ______numbers on the periodic table refer to the number of electrons in the outer shell.
  6. The Elements that are most essential to life are ______, ______, ______, and ______

3.)Define electronegativity and describe its pattern on the periodic table with a labeled arrow:

(Pretend Periodic Table)

4.)Determine whether the following solutions are acidic or basic:

  1. pH = 9 ______
  2. pH = 7.35 ______
  3. pH = 1 ______
  4. pH = 6.97 ______

5.)Describe the structure of an amino acid, draw the basic structure below:

6.)Discuss what makes a certain amino acid acidic, basic, polar, or nonpolar. List the steps to determine these characteristics below:

If the answer to all the above are “no”, what type of amino acid do you have?

______

7.)What is the equation for the buffer system that keeps blood pH consistent? Describe how this keeps blood pH from changing too drastically:

Dr. Kukday’s “Can You?” Questions:

1.)Can you distinguish between the 3 most common types of bonds?

2.)Can you associate different functional groups/molecules with their properties in solution (hydrophobic, hydrophilic, amphipathic)?

3.)Can you describe what pH is indicative of? Why is it important in biology?

4.)Can you, given a pH value, determine whether it is acidic or basic?

5.)Can you describe how pH in the body is kept stable using buffers?

6.)Can you Identify the structure of an amino acid?

7.)Can you determine if a side chain is acidic, basic, uncharged polar or nonpolar?

8.)Can you determine if an amino acid is hydrophobic or hydrophilic?

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