Question 1

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Show how leucine might be synthesized using the Knowles enantioselective synthesis.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 2

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ an amino acid in its zwitterionic form.

Accepted Answer

B

Question 3

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ a carboxyl-protected amino acid.

Accepted Answer

D

Question 4

Exhibit 26-4 Refer to the data below to answer the following question(s): Porcine dynorphin is a neuropeptide having 17 amino acid residues.Its structure is shown below. Tyr−Gly−Gly−Phe−Leu−Arg−Arg−Ile−Arg−Pro−Lys−Leu−Lys−Trp−Asp−Asn−Gln -Refer to Exhibit 26-4.Leu⁵-enkephalin is a pentapeptide contained as the N-terminal sequence of dynorphin.Write the structure of Leu⁵-enkephalin using both the three letter and one letter abbreviations for the amino acids.

Accepted Answer

The answer of Exhibit 26-4
Refer to the data below to...

Question 5

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 6

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ an octapeptide with a C-terminal valine.

Accepted Answer

The answer of Exhibit 26-2
MATCH a structure from the list...

Question 7

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ a polypeptide which gives four fragments on treatment with chymotrypsin.

Accepted Answer

The answer of Exhibit 26-2
MATCH a structure from the list...

Question 8

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 9

The most acidic amino acid is ____.

Accepted Answer

The answer of The most acidic amino acid is ____....

Question 10

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ the product of an Edman degradation.

Accepted Answer

The answer of Exhibit 26-2
MATCH a structure from the list...

Question 11

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 12

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 13

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Draw the condensed structure for leucine,and label all chirality centers with an asterisk.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 14

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Draw a Fischer projection of L-leucine and label the chirality center(s) as R or S.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 15

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.Show the alkyl halide you would use to prepare leucine by the amidomalonate method.

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 16

Exhibit 26-1
Refer to the data below to answer the following question(s):
Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKS1U1B1a1S1U1B0 = 2.36 and pKS1U1B1a2S1U1B0 = 9.60.
-Refer to Exhibit 26-1.What is the pI of leucine?

Accepted Answer

The answer of Exhibit 26-1
Refer to the data below to...

Question 17

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ a peptide coupling reagent.

Accepted Answer

The answer of Exhibit 26-2
MATCH a structure from the list...

Question 18

The most basic amino acid is _____.

Accepted Answer

The answer of The most basic amino acid is _____....

Question 19

Define isoelectric point.

Accepted Answer

The answer of Define isoelectric point....

Question 20

Exhibit 26-2
MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes.

-_____ small organic molecules which act as coenzymes.

Accepted Answer

The answer of Exhibit 26-2
MATCH a structure from the list...

Quiz 26: Biomolecules: Amino Acids,peptides,and Proteins

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ an amino acid in its zwitterionic form.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a carboxyl-protected amino acid.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ an octapeptide with a C-terminal valine.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a polypeptide which gives four fragments on treatment with chymotrypsin.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.

The most acidic amino acid is ____.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ the product of an Edman degradation.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.What is the pI of leucine?

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a peptide coupling reagent.

The most basic amino acid is _____.

Define isoelectric point.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ small organic molecules which act as coenzymes.

Quiz 26: Biomolecules: Amino Acids,peptides,and Proteins

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ an amino acid in its zwitterionic form.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a carboxyl-protected amino acid.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ an octapeptide with a C-terminal valine.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a polypeptide which gives four fragments on treatment with chymotrypsin.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.

The most acidic amino acid is ____.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ the product of an Edman degradation.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pKa1 = 2.36 and pKa2 = 9.60. -Refer to Exhibit 26-1.What is the pI of leucine?

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ a peptide coupling reagent.

The most basic amino acid is _____.

Define isoelectric point.

Exhibit 26-2 MATCH a structure from the list below to each of the following terms.Place the letter of the structure in the blank to the left of the term which it describes. -_____ small organic molecules which act as coenzymes.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 1.50.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Draw the structure of the predominant form of leucine at pH = 10.00.

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.How many possible stereoisomers of leucine are there?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.Leucine is described as an essential amino acid.What does this mean?

Exhibit 26-1 Refer to the data below to answer the following question(s): Leucine is an essential amino acid with the systematic name 2-amino-3-methylpentanoic acid.It has pK_a1 = 2.36 and pK_a2 = 9.60. -Refer to Exhibit 26-1.What is the pI of leucine?