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Introduction to Amino Acids

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Questions and Answers

What is the nitrogen content in proteins?

20% of the molecular weight

16% of the molecular weight (correct)

10% of the molecular weight

5% of the molecular weight

Why did Berzelius suggest that protein substances should be called proteins?

Because they contained nitrogenous compounds

Because they were coagulated on heating

Because they were found in milk and eggs

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

What are the monomers of proteins called?

Amino acids (correct)

Nucleotides

Monosaccharides

Fatty acids

What are proteins made up of?

<p>20 standard amino acids in different sequences and numbers (C)</p> Signup and view all the answers

What is the range of molecular weight for protein molecules?

<p>5000 to 25,00,000 (D)</p> Signup and view all the answers

Study Notes

Proteins

Proteins contain approximately 16% nitrogen.
Berzelius suggested the name "protein" because it is derived from the Greek word "proteios", meaning "of first importance", to emphasize their importance in living organisms.
The monomers of proteins are called amino acids.
Proteins are made up of one or more chains of amino acids, also known as polypeptide chains.
The molecular weight of protein molecules ranges from a few thousand to over a million daltons.

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Description

Learn about the classification, structure, and non-standard types of amino acids with Dr. Mohamed Attia Ragheb, a lecturer of Biochemistry and Molecular Biology. Understand the protein composition and the historical discovery of amino acids by Dutch and Swedish scientists.