To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false. Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain. There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

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Answer 1

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

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1. Identify the following alkenes as E or Z NH₂ Br 2. Draw the structures based on the IUPAC names (3R,4R)-3-bromo-4-fluoro- 1-hexene (Z)-4-bromo-2-iodo-3-ethyl- 3-heptene تر 3. For the following, predict all possible elimination product(s) and circle the major product. HO H₂SO4 Heat 80 F4 OH H2SO4 Heat 어요 F5 F6 1 A DII 4 F7 F8 F9 % & 5 6 7 * ∞ 8 BAB 3 E R T Y U 9 F D G H J K O A F11 F10

Draw the major product of this reaction. Ignore inorganic byproducts. ○ O 1. H₂O, pyridine 2. neutralizing work-up a N W X 人 P

Answer 2

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

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Answer 3

Question

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

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Answer 4

Question

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

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Answer 5

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

Answer 6

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

Answer 7

Chapter 26, Problem 26.105EP

(a)

Interpretation Introduction

Interpretation: To identify whether the statement “four of the 20 standard amino acids contain sulfur” concerning sulfur-containing amino acids is true or false.

Concept introduction: Amino acids are the biomolecules which contain an amino group, carboxylic acid group, and an alkyl chain. Amino acids are the main building block of protein molecules. A large number of amino acids condense together to form a polypeptide chain.

There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.

Answer 8

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

Answer 9

(b)

Interpretation Introduction

Interpretation: To identify whether the statement “the first step in the degradation of the amino acid cysteine is a transamination reaction” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

Answer 10

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

Answer 11

(c)

Interpretation Introduction

Interpretation: To identify whether the statement “pyruvate is the sulfur-containing product from the degradation of the amino acid cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. These are arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, valine, alanine, asparagines, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine. Only two of the twenty amino acids have a sulfur atom in their structure. The two amino acids are cysteine and methionine. The structure of cysteine is:

Cysteine gives pyruvate as the degradation product. The degradation of cysteine is a two-step process.

Answer 12

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

Answer 13

(d)

Interpretation Introduction

Interpretation: To identify whether the statement “ATP is the activating agent in the first step of the conversion of serine to cysteine” concerning sulfur-containing amino acids is true or false.

Concept introduction: There are 20 amino acids present in nature. Only two of the twenty amino acids have a sulfur atom in their structure. Cysteine is biosynthesized from nonessential amino acid serine. The structure of cysteine is:

The structure of serine is:

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 26.1 - Which of the following statements about dietary...Ch. 26.1 - Dietary protein materials as they leave the...Ch. 26.1 - The inactive form of pepsin is converted to its...Ch. 26.1 - Which of the following is not a proteolytic...Ch. 26.2 - The dominant use for the amino acids of the amino...Ch. 26.2 - The most abundant amino acid in the amino acid...Ch. 26.2 - Prob. 3QQ Ch. 26.3 - Prob. 1QQ Ch. 26.3 - Prob. 2QQ Ch. 26.3 - The net effect of transamination is to collect the...

Solution Summary: The author analyzes whether the statement "four of the 20 standard amino acids contain sulfur" is true or false.

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