Biol 1201 Section 1
Thursday, March 5 at 6:00 PM
in Campbell Auditorium .
Bring your LSUID and a number two
I'll provide the questions and a scantron.
There are 54 questions = 108 points.
the material covered in lecture, the corresponding chapters in the text are indicated in the syllabus,
chapters 7 through 10.
Know the material well!
Read the exam questions and answers carefully.
One study suggestion
If you have a study partner, try to explain the summary figures from the chapters and the figures
listed in this study guide to one another.
Often if you stare at a figure long enough you think you
have it down.
However, if you try to explain it to someone, it becomes clear whether you really do
Membranes and membrane function
How are membranes adjusted for different temperatures?
Membrane fluidity- An increase in saturated fats will increase the fluidity
Transport of materials across the membrane-
What types of molecules can move across the membrane? Very small uncharged
particles/molecules and hydrophobic
Transport Processes :
Simple diffusion-passive transport w/o the help of proteins (carrier proteins)
Facilitated diffusion – passive transport with help of proteins
Active Transport-movement against the conc. Gradient requires ATP
Tonicity (isotonic- = water potential, = # of solutes dissolved, no net movement. Hypertonic-lower
WP, more solutes dissolved, gain water(thirsty). Hypotonic-higher WP, less solutes dissolved,
loses water (fat hippos)
Aquatic organisms Marine invertebrates(free amino acids) and sharks(urea) isotonic w/sea water.
Freshwater bony fish[teleost fish](hypertonic to fresh h2o) Marine bonyfish[teleost] hypertonic
Osmosis-net movement of water across a semipermeable membrane and the direction of net
Figures 7.2, 7.3, 7.5, 7.11, 7.12,
, 7.16, 7.17
Function of enzymes-regulated by protein catalysts (breaker downer lipids to fatty acids)
How they work-synthesis of energy carrier molecules to store energy transported from place to
place, regulate flow. Couple reactions together so that unfavorable reactions can occur at the
expenseof reactions that release energy. Lower activation energy
)which speeds up
reaction rate bcuz its catalyzed
Coenzymes-small organic protein molecules that carry chemical groups between enzymes
Inhibition (Figures 8.17(Catalytic Cycle), 8.19(Enzyme Inhibition, 8.20 and 8.22)
Competitive-fighting for active site, Noncompetitive-fitting in its own active site,
Allosteric(Multiple active sites), Feedback(active site used but then closed)