Exam 2 Flashcards
Match the term on the left with the appropriate description on the right.
Triglyceride A. Barrier to some
solutes, not others
Unsaturated B. Has double bonds
Semipermeable C. Require energy
Facilitated diffusion D. Lack double
bonds
Active transport E. Lipid
F. Ends at
equilibrium
Triglyceride - E
Unsaturated - B
Semipermeable - A
Facilitated diffusion - F
Active transport - C
What do we call the coiled structures in this protein?
A. Alpha helices
B. Beta sheets
C. Loops
D. Secondaries
A. Alpha helices
These coils are folded all together to create the final 3-D shape of the protein.
Tertiary
What do we call the monomers that are put together to make polypeptides?
Amino Acids
What kind of chemical reaction is used to break down polypeptides and other polymers?
Hydrolysis
HOW does ATP add energy to other molecules, for example when it is used to make a sodium pump change shape?
A. ATP releases heat
B. ATP adds a phosphate group to a molecule
C. ATP breaks disulfide bridges
D. ATP Creates double bonds
B. ATP adds a phosphate group to a molecule
What single property do ALL lipids have in common?
A. They are fatty acids
B. They form hydration shells
C. They are non-polar
D. They are hydrophobic
D. They are hydrophobic
Triglycerides can be either fats or oils at room temperature. Structurally (shape) how do the fatty acids of fats and oils differ, and what causes that difference at a molecular level?
In saturated fats, there are no double carbon bonds, more viscous, straight, and packed together. While in unsaturated fats, there are double carbon bonds, more fluid, loosely packed, and more bent. In which, saturated fats are fats while unsaturated are oils.
It is a viscous membrane. What does he see in the membrane that makes him think that?
They are saturated fatty acids and densely packed together
How would adding cholesterol effect the fluidity of this membrane (viscous)?
A. It would make it more fluid
B. It would make it more viscous
C. It would not affect fluidity
A. It would make it more fluid
The letters A-D each indicate one of the membrane proteins above. What type of membrane protein would call protein “C”? (C is stuck in but not all the way in)
Integral protein
Assume the solute concentrations (Na+, circles; Cl-, triangles) are shown at equilibrium, what (specifically) would you call protein “D”?
Cl- Channel
The area above the membrane is outside the cell, and the area below the membrane is inside the cell. How would you describe the cytoplasm?
A. Isotonic
B. Hypotonic
C. Hypertonic
B. Hypotonic
If protein “A” is part of a G-protein coupled receptor and binds to ligand, what important change will happen at protein “B”? (A characteristic of G-protein coupled receptor activation)
The GDP will be converted to GTP
What molecules make up this membrane? (head and tail)
A. Cholesterol
B. Triglycerides
C. Phospholipids
D. Steroids
C. Phospholipids