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Exam 1 Review – Part 1
Supplemental Instruction
Iowa State University
Caleb, Lauren, Brandon
Biol 212
Coffman/Manz/Kukday/ Howell
1. Facilitated diffusion transport:
a. requires membrane channel or carrier protein.
b. requires ATP hydrolysis.
c. requires H cotransport.
d. requires membrane potential.
e. requires osmosis.
2. An electrochemical gradient is NOT dependent upon:
a. the membrane potential.
b. the chemical concentration gradient.
c. facilitated diffusion.
d. active transport.
e. osmosis.
3. 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
4. The lipid bilayer is held together primarily by:
a. The repulsion of phospholipid tails and water
b. Linkage of phospholipids together by ester bonds
c. High concentration of transmembrane proteins and cholesterol
d. Hydrogen bonds and Van deer Waals forces
Which of these answers correctly identifies the macromolecules from left to right
A is a carbohydrate, B is a lipid, C is a nucleic acid
A is a lipid, B is a carbohydrate, C is a protein
A is a nucleic acid, B is a lipid, C is a protein
A is a nucleic acid, B is a carbohydrate, C is a protein
1060 Hixson-Lied Student Success Center  515-294-6624  
A cation occurs when a neutral atom or molecule…
a. Loses an electron
b. Gains a neutron
c. Loses a proton
d. Gains an electron
7. The side chain of tyrosine is best classified as…
Polar uncharged
The nucleic acid is:
a. Basic
b. Acidic
c. Nonpolar
d. Polar
The amino acid is:
a. Basic
b. Acidic
c. Nonpolar
d. Polar
10. 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
11. True or False: Unsaturated Fatty Acids have only single bonds. (Explain if false)
12. What is permeability and list four factors that influence permeability?
13. What part of the phospholipid bilayer have hydrophobic properties?
Nonpolar tails
Nonpolar heads
Polar tails
Polar heads
14. 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
15. 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
16. What is the structural difference between an RNA structure and a DNA structure?
a. RNA does not have a phosphate group
b. DNA has an extra Carbon, making it a six-carbon sugar
c. RNA has an –OH on its five-carbon sugar while DNA has an –H
d. DNA does not have a phosphate group
17. What is NOT a kind of lipid?
a. Fats
b. Steroids
c. Phospholipid
d. Glucose
18. If a solution is hypotonic to the cell, which of the following will happen
a. Nothing. The phospholipid membrane stops the solutes from moving.
b. The water moves into the cell because it has a greater number of solutes.
c. The water moves out of the cell because it has a lesser number of solutes.
d. The ions in the cell move out because they want to follow the chemical gradient.
19. 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
b. Diffusion
c. Channels
d. Osmosis
e. Carrier Proteins
Differences/Molecules Transported:
- Active - Passive 20. Which of the following is not true: If a molecule is being moved by secondary transport, it is:
a. Being moved with the gradient
b. Required energy from a second molecule to power its transportation
c. Being moved against the chemical gradient
d. Is used to move ions and large molecules
21. True or False: Water moves from regions of low solute concentration to high solute
concentrations, while solutes move from areas of high concentrate to areas of low
22. Put the following in order of high permeability and low permeability
a. Large, polar molecules
b. Small, polar molecules
c. Ions
d. Small, nonpolar molecules
23. Match the following molecules to the four kinds of molecules which cross membranes above.
a. urea (CH N O)
b. methane (CH4)
c. Sulfite (SO3 )
d. sulfur dioxide (SO2)