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Questions and Answers
What is the nitrogen content in proteins?
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?
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?
What are the monomers of proteins called?
- Amino acids (correct)
- Nucleotides
- Monosaccharides
- Fatty acids
What are proteins made up of?
What are proteins made up of?
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What is the range of molecular weight for protein molecules?
What is the range of molecular weight for protein molecules?
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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.
