Leader: Shanna
Course: BIOL 212
Instructor: Kukday
Supplemental Instruction
Date: 2/2/2014
Iowa State University
Chapter 2: The Chemical Basis of Life I: Atoms, Molecules, & Water
EXAM 1 Review!
Ch. 2, 3, 4, 5
1. What would have happened during the Rutherford experiment if atoms were composed of
evenly distributed charges?
a. The alpha particles wouldn’t have deflected at all
b. Many of the alpha particles would have been slightly deflected
c. All of the alpha particles would have bounced back
d. Half would deflect and half would bounce back
2. Identify the following bonds as covalent, ionic, or hydrogen:
a. Sodium Chloride, NaCl
b. Ethanol, CH3CH2OH
c. Bonds between the bases in DNA
d. Bonds between the sugars and phosphates in DNA
3. What is the difference between a strong acid and a weak acid?
a. Strong acids increase the OH- concentration in solution, weak acids increase the H+
b. Strong acids increase the H+ concentration in solution, weak acids increase the OHc. Strong acids completely dissociate into their ions in solution, weak acids partially
dissociate
d. Weak acids completely dissociate into their ions in solution, strong acids partially
dissociate
4. Two monosaccharaides join to form a disaccharide via:
a. Hydrolysis reaction
b. Condensation reaction
c. Acid-Base equilibrium reaction
Chapter 3: The Chemical Basis of Life II: Organic Molecules
5. Glucose & fructose both have the molecular formula C6H12O6, they are:
a. Structural isomers
b. Stereoisomers
c. Enantiomers
6. Alpha and beta glucose are examples of:
a. Stereoisomers
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b. Enantiomers
c. Structural Isomers
What would happen if phospholipids were put into oil instead of water?
a. They would form micelles
b. They would dissolve completely
c. They would form a bilayer with the tails facing in and the heads facing out
d. They would form a bilayer with the heads facing in and the tails facing out
The bond between sugars are called ________, which are _________ bonds.
a. Glycosidic bonds, ionic
b. Glycosidic bonds, covalent
c. Peptide bonds, ionic
d. Peptide bonds, covalent
e. Phosphodiester bonds, hydrogen
T/F Amino acids are the monomers of nucleic acids?
You isolate an organic molecule and find that it is hydrophilic and contains phosphate functional
groups, what is a possible identity of this molecule?
a. Phospholipid
b. Nucleic Acid
c. Amino Acid
d. Polysaccharide
Chapter 4: General Features of Cells
11. Proteins that are destined to leave the cell are synthesized at:
a. Rough ER
b. Smooth ER
c. Cytosol
d. All of the above
12. What is the common path for a protein undergoing vesicle transport?
a. Smooth ER, rough ER, Golgi apparatus, plasma membrane
b. Golgi apparatus, rough ER, smooth ER, plasma membrane
c. Nucleus, smooth ER, Golgi Apparatus, rough ER, plasma membrane
d. Rough ER, smooth ER, Golgi apparatus, plasma membrane
13. An example of a destination for a protein that undergoes post-translational sorting is:
a. Endoplasmic Reticulum
b. Plasma Membrane
c. Nucleus
d. Lysosome
14. How does a protein “know” to be sorted co-translationally? (Sent to destination while
simultaneously being translated from RNA)
a. It contains v-snares which interact with t-snares at its target
b. A signal recognition particle binds to an ER signal sequence on the protein
c. Chaperone proteins guide the ribosome to the ER
Chapter 5: Membrane Structure, Synthesis, & Transport
15. Why do phospholipids form bilayers in aqueous environments such as our bodies?
a. They are amphipathic
b. They are hydrophobic
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c. They are hydrophilic
d. Chaperone proteins guide them to do so
How could a cell keep its membrane less fluid when it gets hot?
a. Increase the number of unsaturated lipids
b. Increase the number of saturated lipids
c. Increase the number of lipids with shorter tails
T/F Facilitated diffusion is an example of active transport
Why is water able to pass quickly through the membrane even though it is hydrophilic?
a. It is small and charged
b. It doesn’t
c. It uses ATP hydrolysis
d. It goes through the many aquaporins in the membrane
Will water move into or out of the cell below?
20. How can a solute be moved across a membrane against its concentration gradient?
a. A pump uses energy input (usually ATP) to move it
b. It diffuses through a channel
c. A symporter can take advantage of another solute that IS going with its gradient
d. A & C
e. All of the above
f. None of the above