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1. An article in the Wall Street Journal in early 2001 noted two developments in the market for laser eye surgery. The first development concerned side effects from the surgery, including blurred vision. The second development was that the companies renting eye-surgery machinery to doctors had reduced their charges. In the market for laser eye surgeries, these two developments (Points : 1)
decreased demand and decreased supply, resulting in a decrease in the equilibrium quantity and an increase in the equilibrium price of laser eye surgeries.
decreased demand and increased supply resulting in an increase in both the equilibrium quantity and the equilibrium price of laser eye surgeries.
decreased demand and increased supply, resulting in a decrease in the equilibrium price and an uncertain effect on the equilibrium quantity of laser eye surgeries.
decreased demand and increased supply, resulting in a decrease in both the equilibrium price and the equilibrium quantity of laser eye surgeries.

2. Buyers scrambled to secure stocks of Australian wool following a forecast of an 11 percent decline in wool production. What happens in the Australian wool market as a result of this announcement? (Points : 1)
The demand curve for Australian wool shifts to the left in anticipation of higher prices in the future.
The demand curve for Australian wool shifts to the right in anticipation of higher prices in the future.
The supply curve for Australian wool shifts to the right in anticipation of higher prices in the future.
The supply curve for Australian wool shifts to the left in anticipation of lower quantities in the future.

3. The law of demand implies, holding everything else constant, that (Points : 1)
as the price of bagels increases, the quantity of bagels demanded will decrease.
as the price of bagels increases, the demand for bagels will decrease.
as the price of bagels increases, the quantity of bagels demanded will increase.
as the price for bagels increases, the demand of bagels will increase.

Refer to Figure 3-5. Assume that the graphs in this figure represent the demand and supply curves for used clothing, an inferior good. Which panel describes what happens in this market as a result of a decrease in income? (Points : 1)
Panel (a)
Panel (b)
Panel (c)
Panel (d)

5. George Gnat subscribes to a monthly pest control service for his home. Last week the owner of the service informed George that he will have to raise his monthly service fee because of increases in the price of gasoline used by his workers on their service trips. How is the market for pest control services affected by this? (Points : 1)
There is an increase in the supply of pest control services.
There is a decrease in the demand for pest control services.
There is a decrease in the quantity supplied of pest control services.
There is a decrease in the supply of pest control services.

Figure 4-6 shows the market for apartments in Bay City. Recently, the government imposed a rent ceiling at R0.

Refer to Figure 4-6. What is the area that represents the producer surplus after the imposition of the ceiling? (Points : 1)
F + G
F
D + F + G
A + B + D + F + G

7. Congress passed the Freedom to Farm Act in 1996. What was the purpose of this Act? (Points : 1)
To encourage more people to become farmers.
To grant free land to farmers in order to produce crops that were particularly scarce.
To phase out the use of price ceilings in agricultural markets.
To phase out price floors and return to a free market in agriculture.

Figure 4-7 shows the demand and supply curves for the almond market. The government believes that the equilibrium price is too low and tries to help almond growers by setting a price floor at Pf.

Refer to Figure 4-7. What is the area that represents producer surplus after the imposition of the price floor? (Points : 1)
A + B + E
B + E
B + E + F
B + C + D + E

9. Economists have shown that the burden of a tax is the same whether the tax is collected from the buyer or the seller. Why, then, are gasoline and cigarette taxes imposed on sellers? (Points : 1)
Sellers are more honest than buyers.
The demand for both gasoline and cigarettes is very elastic.
The Equal Protection Clause of the U.S. Constitution prohibits the government from imposing taxes like these on buyers.
It is more difficult for buyers to keep track of their purchases, and for the government to verify that the right of amount of tax revenue is collected.

10. David Card and Alan Kruger conducted a study of fast-food restaurants in New Jersey and Pennsylvania. The study found that (Points : 1)
there was a large reduction in employment of low-skilled workers when the minimum wage was raised in these states.
the earned income tax credit is more effective in raising the incomes of low-skilled workers than increases in the minimum wage.
increases in the minimum wage had a very small impact on employment.
increases in the prices of food have a greater effect on wage increases in New Jersey than in Pennsylvania.

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1. An article in the Wall Street Journal in early 2001 noted two developments in the market for laser eye surgery. The first development concerned side effects from the surgery, including blurred vision. The second development was that the companies renting eye-surgery machinery to doctors had reduced their charges. In the market for laser eye surgeries, these two developments (Points : 1)
decreased demand and decreased supply, resulting in a decrease in the equilibrium quantity and an increase in the equilibrium price of laser eye surgeries.
decreased demand and increased supply resulting in an increase in both the equilibrium quantity and the equilibrium price of laser eye surgeries.
decreased demand and increased supply, resulting in a decrease in the equilibrium price and an uncertain effect on the equilibrium quantity of laser eye surgeries.
decreased demand and increased supply, resulting in a decrease in both the equilibrium price and the equilibrium quantity of laser eye surgeries.
The demand decreases because of the article, there is increase in supply as the rent of equipment has declined. So the equilibrium price will be lower but the equilibrium quantity cannot be predicted with the information provided: decreased demand and increased supply, resulting in a decrease in the equilibrium price and an uncertain effect on the equilibrium quantity of laser eye surgeries.

2. Buyers scrambled to secure stocks of Australian wool following a forecast of an 11 percent decline in wool production. What happens in the Australian wool market as a result of this announcement? (Points : 1)
The demand curve for Australian wool shifts to the left in anticipation of ...

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Amino acids multiple choice questions

Which statement is incorrect about the classification of amino acids?
a. Alanine and valine are neutral, nonpolar amino acids.
b. Lysine and arginine are basic amino acids.
c. Tryptophan and phenylalanine are aromatic amino acids.
d. Aspartic acid and aspargine are acidic amino acids.

Which of the following amino acids is the least water soluble at pH 7.0?
a. Tryptophan
b. Glutamic acid
c. Cysteine
d. Histidine

Which amino acid would migrate the furthest toward the anode (positive electrode) during paper electrophoresis at pH 7.0?
a. Aspartic acid
b. Alanine
c. Lysin
d. Glutamine

Which of the following functional groups, attached to an inert matrix, could function as a cation exchanger?
a. Diethylaminoethyl-
b. p-aminobenzyl-
c. Carboxymethyl-
d. Trimethylammonium-

Which of the following amino acids would make the best buffer at pH 4.5?
a. Histidine
b. Alanine
c. Glutamine
d. Aspartic acid

Which fact is incorrect about stereoisomers?
a. A diastereomer is a nonsuperimposable non-mirror image.
b. An enantiomer is a nonsuperimposible mirror image.
c. Diastereomers have different melting points.
d. Diastereomers rotate plane polarized light in equal but opposite direction.

Which statement is incorrect about L-isoleucine?
a. Its enantiomer is named O-isoleucine.
b. It contains a total of two asymmetric or chiral carbons.
c. It can also be named as (28, 38)-isoleucine using the (R,8) system.
d. Its diastereomer would be named O-alloisoleucine.

An isoelectric amino acid was dissolved in water and the resulting pH was approximately 7.6. What amino acid would possess this property?
a. Alanine
b. Glutamic acid
c. Histidine
d. Lysine

What volume of NaOH is required to adjust the solution of monosodium aspartate to pH 9.8?
a. 1 ml
b. 2 ml
c. 3 ml
d. 6 ml or more

What volume of 2 N Hel is required to completely titrate the 4 mmol of monosodium aspartate?
a. 2 ml
b. 3ml
c. Aml
d. 6 ml or more

Which statement is correct about the peptide ala-ser?
a. Alanine is at the N-terminal of the peptide.
b. There are a total six atoms that lie in the plane of the peptide bond linking alanine to serine.
c. The alpha-carbon of alanine is sp3 hybridized d All the above are correct statements.

What is the product formed from the acid hydrolysis of a simple amide?
a. Acid & base
b. Aldehyde & alcohol
c. Acid & amine
d. Ester & alcohol

The complete acid hydrolysis of the peptide ala-gln-trp-ser would yield:
a. Ala, gin, trp, ser
b. Ala, glu, ser
c. Ala, glu, trp, ser
d. Ala. ser

Fibrous proteins, such as collagen, have which of the following properties?
a. Highly soluble in water
b. Their hydrophilic residues are directed into the interior of the protein
c. Exhibit enzymatic activity
d. Serve structural roles in the cell

Quaternary structure is associated with:
a. The overall shape of a polypeptide chain
b. The sum of the secondary and tertiary interactions
c. Simple proteins with only one subunit
d. The relative orientation of one polypeptide to another polypeptide in a multi-subunit protein.

The information needed to define the structure of a protein is essentially contained in:
a. Amino acid composition
b. Amino acid sequence
c. Secondary structure
d. Tertiary structure.

Insulin is a polypeptide hormone that contains two short polypeptide chains linked by two interstrand disulfide bonds. The most logical order of events to perform in order to sequence this protein would be:
A: The peptides are reduced with mercaptoethanol.
B: The peptides are sequenced using Edman chemistry .
C: The peptides are separated by chromatography techniques. 0: The peptides are alkylated with iodoacetamide.
a. A, D,C, B b.C,A, 0, B
c. C, B, A, 0
d. A, B, C, 0

Which statement is incorrect about the peptide val-asp-trp-asn-ser?
a. This peptide would show a strong absorption band at 280 nm.
b. Reaction with chymotrypsin would yield two peptides.
c. To synthesize this peptide using the solid phase method of Merrifield, the amino acid directly attached to the resin would be serine.
d. After the second round of Edman chemistry using the reagent PITC, the PTH -amino acid residue released would be PTH-asn.

Which statement is incorrect about the reaction of the peptide ser-Iys-asp-trp-cys-metasn-phe-ala with the following reagents?
a. Reaction with cyanogens bromide would yield two peptides.
b. Reaction with trypsin would result in three peptides. The smallest of three peptides would have the highest pi of the three.
c. Reaciton with chymotrypsin would result in the peptides ser-Iys-asp & try-cys-met-Iysasn-phe-ala .
d. Reaction with chymotrypsin would yield a different set of peptides that overlap those obtained with tryspsin

Determine the amino acid sequence of the following oligopeptide from the experimental data below:
The amino acid composition is found the be ala, Iys, phe, met, cys plus some
decompsition products.
2. The peptide has a molecular weight around 700 Da and absorbs at 280 nm.
3. Treatment with carboxypeptidase results in tryptophan and a peptide.
4. CNBr treatment yields a tetrapeptide and a dipeptide.
5. Trypsine digestion produces an amino acid and a pentapeptide with met on the amino end.
6. Chymotrypsin digestion yields a dipeptide and a tetrapeptide.
a. trp-Iys-met-cys-met-ala
b. Iys-met-cys-phe-ala-trp
c. trp-ala-phe-cys-met-Iys
d. Iys-ala-cys-phe-met -trp

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