The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained. Concept introduction: The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory. The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

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Answer 1

Question

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

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Answer 2

Question

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

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Answer 3

Question

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

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Answer 4

Question

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

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Answer 5

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

Answer 6

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

Answer 7

Chapter 12, Problem 44RE

Interpretation Introduction

Interpretation:

The reason behind the fact that selenocysteine is called the 21st amino acid when there are many more amino acids found than the 20 basic ones coded for by the genetic code is to be explained.

Concept introduction:

The unnatural amino acids are not encoded by the nucleotide sequences of the genetic material. There are over 140 amino acids that are found naturally in proteins and more than 140 amino acids that can be formed in the laboratory.

The unnatural amino acids are the modification of the preexisting amino acids. The modification can be done during the process of translation or after the formation of proteins.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 12 - RECALL Prepare a flow chart showing the stages of...Ch. 12 - Prob. 2RE Ch. 12 - RECALL Define degenerate code.Ch. 12 - RECALL How can the binding assay technique be used...Ch. 12 - RECALL Which nucleotides break the rules of...Ch. 12 - Prob. 6RE Ch. 12 - Prob. 7RE Ch. 12 - REFLECT AND APPLY It is possible for the codons...Ch. 12 - Prob. 9RE Ch. 12 - Prob. 10RE

Solution Summary: The author explains that selenocysteine is called the 21st amino acid because it is incorporated into the polypeptide chain during the process of translation.

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