1. review material chapters two & five

2. unit I review material

3. acids & bases HCl  H+ + Cl acid base dissociates into H+
dissociates into OH
NaOH  Na+ + OH
Figure 2.6

4. acid-base balance H+ in solution expressed as pH pH = -log [H+]
increasing [H+] increases acidity
increasing [OH-] increases alkalinity
Figure 2.7

5. enzyme activity enzymes denatured by temperature and pH Figure 5.6
Figure 5.5b
Figure 5.5a

6. A + B A–B  A + B A–B  chemical reactions
making or breaking of bonds between atoms
result in change in chemical energy
potential kinetic energy
exergonic reactions release energy
endergonic reactions absorb energy A + B
A–B
Atom, ion, or molecule A 
Atom, ion, or molecule B
Molecule AB A + B
A–B
Atom, ion, or molecule A 
Atom, ion, or molecule B
New molecule AB

7. microbial metabolism catabolism anabolism energy-releasing processes
energy-using processes
Figure 5.1