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Amino Acids: Classification and Structure

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Amino Acids: Classification and Structure

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Questions and Answers

What is the nitrogen content in proteins?

Around 10% of the molecular weight

Around 16% of the molecular weight (correct)

Around 5% of the molecular weight

Around 25% of the molecular weight

Why did Berzelius suggest the term 'proteins' for these substances?

Because he thought them to be most important of biological substances (correct)

Because of their high nitrogen content

Because they could be coagulated on heating

Because they were primarily found in milk and eggs

What are proteins made up of?

20 standard amino acids in different sequences and numbers (correct)

10 standard amino acids in different sequences and numbers

5 standard amino acids in different sequences and numbers

30 standard amino acids in different sequences and numbers

What are the monomers of proteins called?

<p>Amino α-amino acids</p> Signup and view all the answers

What did GJ Mulder find about substances in milk and eggs?

<p>They could be coagulated on heating and were nitrogenous compounds</p> Signup and view all the answers

Study Notes

Proteins Overview

Proteins contain approximately 16% nitrogen by weight.

Origin of the Term "Proteins"

Jons Jakob Berzelius suggested the term "proteins" for these substances because they are primary or essential components of living organisms.

Protein Composition

Proteins are made up of amino acids, which are organic compounds.

Monomers of Proteins

The monomers of proteins are called amino acids.

Discovery about Substances in Milk and Eggs

GJ Mulder discovered that substances in milk and eggs, previously thought to be albumin, were actually complex nitrogen-containing compounds, which led to the coinage of the term "proteins".

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Description

Learn about the classification, structure, and non-standard amino acids with Dr. Mohamed Attia Ragheb, a renowned lecturer of Biochemistry and Molecular Biology. Explore the protein composition and the historical background of amino acids' discovery.