Esterase is an enzyme that catalyzes the hydrolysis of esters. It hydrolyzes esters of l-amino acids more rapidly than esters of D-amino acids. How can this enzyme be used to separate a racemic mixture of amino acids?

How are esters related to carboxylic acids?

What are the characteristics of carboxylic acids and esters?

A(n) ______ contains more than 10 amino acids, but a(n) ______ has more than 100 amino acids.

In some proteins, the side chain of serine appears to undergo ionization. Explain why ionization would be facilitated by the presence of an aspartate residue nearby.

Find the radian measure of an angle of $300^{\circ}.$

Use the following information about quadratic functions. $\text { vertex form: } y=a(x-h)^{2}+k \quad \text { standard form: } y=a x^{2}+b x+c$ When $y=-3 x^{2}-18 x-23$ is written in vertex form, what is the value of k?

In what order would histidine, serine, aspartate, and valine be eluted with a buffer of pH 4 from a column containing an anion-exchange resin (Dowex 1)?

The sales tax in the town where Amanda lives is 7%. Amanda paid $35 in sales tax on a new stereo. What was the price of the stereo?

a. Which amino acid has the lowest pI value? b. Which amino acid has the highest pI value? c. Which amino acid has the greatest amount of negative charge at pH = 6.20? d. Which amino acid has a greater negative charge at pH = 6.20, glycine or methionine?

Three peptides were obtained from a trypsin digestion of two different polypeptides. In each case, indicate the possible sequences from the given data and tell what further experiment should be carried out in order to determine the primary structure of the polypeptide. a. polypeptide I: 1. Val-Gly-Asp-Lys 2. Leu-Glu-Pro-Ala-Arg 3. Ala-Leu-Gly-Asp; b. polypeptide II: 1. Val-Leu-Gly-Glu 2. Ala-Glu-Pro-Arg 3. Ala-Met-Gly-Lys

A sample of LSD (D-lysergic acid diethylamide, $\mathrm { C } _ { 24 } \mathrm { H } _ { 30 } \mathrm { N } _ { 3 } \mathrm { O } )$ is added to some table salt (sodium chloride) to form a mixture. Given that a 1.00-g sample of the mixture undergoes combustion to produce 1.20 g of CO 2, what is the mass percentage of LSD in the mixture?

Determine whether the following statements are true and give an explanation or counterexample.

The hyperbola $x ^ { 2 } / 4 - y ^ { 2 } / 9 = 1$ has no y-intercepts.

The graph of which function has a period of

$$\frac { 2 \pi } { 3 }$$

and an asymptote at

$$x = \frac { \pi } { 2 } ?$$

$$A. y = \sec \frac { 3 } { 2 } x$$

$$B. y = \sec 3 x$$

$$C. y = \csc \frac { 3 } { 2 } x$$

$$D. y = \csc 3 x$$