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Exam 1 Review
Supplemental Instruction
Iowa State University
Caleb I, Brandon W, Lauren M
BIOL 212
Coffman/Manz/Kukday/Howell
1/29/2017
1.) Label the bond types for each bond in the compounds below:
a. Na-Cl Ionic
b.
c.
Covalent
Polar Covalent
2.) Can you, given a pH value, determine whether it is acidic or basic? ----- Label the
following pH levels as acidic, basic, or neutral:
a. 8.05 basic
b. 4.54 acidic
c. 6 acidic
d. 7 neutral
e. 13.4 basic
3.) The structural level of a protein in which alpha helixes and beta pleated sheets are present
is the
A. Primary level
B. Secondary level
C. Tertiary level
D. Quaternary level
4.) Match the following monomers:
Carbohydrates C
lipids D
Proteins A
nucleic acids B
A.
B.
C.
D.
amino acids
nucleotides
sugars
phospholipid
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5.) What part of the phospholipid bilayer have hydrophobic properties?
a.
Nonpolar tails
b.
Nonpolar heads
c.
Polar tails
d.
Polar heads
6.) What are the three parts that make up a Nucleic Acid?
a. Phosphate group, five-carbon sugar, water group
b. Phosphate group, six-carbon sugar, water group
c. Glucose group, five-carbon sugar, nitrogenous base
d. Phosphate group, five-carbon sugar, nitrogenous base
7.) What are the three parts that make up an amino acid?
a.
Amino group, carboxyl group, side chain
b.
Glucose group, carboxyl group, side chain
c.
Amino group, water group, nitrogenous base
d.
Amino group, carboxyl group, nitrogenous base
8.) Look at the following images and determine the level of protein structure. Label
aspects of the images that indicate the level of structure.
a.
b.
c.
d.
e.
f.
g.
h.
9.) What is the structural difference between an RNA structure and a DNA structure?
RNA does not have a phosphate group
DNA has an extra Carbon, making it a six-carbon sugar
RNA has an –OH on its five-carbon sugar while DNA has an –H
DNA does not have a phosphate group
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Higher Level Questions:
1.) Why are biological membranes important to life and this class?
2.) In your groups, discuss the role of DNA in cell function:
3.) Describe the difference between hypertonic, hypotonic, and isotonic solutions:
4.) Describe what a concentration gradient is and how it drives transport across membranes:
5.) Describe the difference between saturated and unsaturated lipids. Explain the difference
in permeability between these lipids.
1060 Hixson-Lied Student Success Center  515-294-6624  [email protected]  http://www.si.iastate.edu
Kukday-Specific Questions:
1.) If a strand of DNA has 20% Adenine, How much of Guanine is there?
A=T, C=G
A+T+C+G = 100%
20 +20 + 2x = 100%
2x = 60%
x= G/C = 30%
2.) Can you determine if a side chain is acidic, basic, uncharged polar, or nonpolar? ----- List
the 4 steps used to determine the side chain properties:
1.
2.
3.
4.
3.) The side chain of tyrosine is best classified as…
a.
Polar uncharged
b.
Nonpolar
c.
Basic
d.
Acidic
4.) The amino acid is:
a.
Basic
b.
Acidic
c.
Nonpolar
d.
Polar
5.) A _________ is formed by a specific electrostatic interaction between an electronegative
atom and a H atom.
A. Covalent bond
B. Peptide bond
C. Hydrogen bond
D. Ionic Bond
E. Hydrophilic-Hydrophobic attraction
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6.) If you were to put phospholipids into a cup of vegetable oil, which picture shows what could
be expected?
a.
A
b.
B
c.
C
d.
D
7.) What is NOT a kind of lipid?
a.
Fats
b.
Steroids
c.
Phospholipid
d.
Glucose
8.) Label the following as active transport or passive transport. What is the difference between
the two kinds of transport? What kind of molecules need active compared to passive.
a.
Pumps
______________________Active______________________
b.
Diffusion
_____________________Passive_______________________
c.
Channels
_____________________Passive_______________________
d.
Osmosis
_____________________Passive_______________________
e.
Carrier Proteins
_______________________Both_____________________
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9.) Draw what will happen when the solution is at equilibrium if the purple circles are big polar
ions and the pink circles are small nonpolar molecules:
10.) Put the following in order of high permeability and low permeability
a.
Large, polar molecules
3
b.
Small, polar molecules
2
c.
Ions
4
d.
Small, nonpolar molecules 1
11.) Identify whether the following solutions are hypertonic, isotonic, or hypotonic. Draw the
direction of water flow in each example:
Isotonic
_________________
hypotonic
_________________
hypertonic
_________________
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hypotonic
________________
isotonic
____________________
hypertonic
_________________
12.) Draw an example of a protein that works by facilitated diffusion. Discuss in your groups the
differences between facilitated and passive diffusion:
13.) Describe how this buffer system keeps blood pH from changing too drastically:
1060 Hixson-Lied Student Success Center  515-294-6624  [email protected]  http://www.si.iastate.edu