12 Questions
Which type of protein is soluble in water and tends to have roughly spherical shapes?
Globular proteins
What is the main function of fibrous proteins like keratin and collagen?
Maintaining cell shape
What process results in proteins losing their quaternary, tertiary, and secondary structure?
Denaturation
What is the main effect on cell activity when proteins in a living cell are denatured?
Disruption of cell activity
How are medical supplies and instruments sterilized to destroy bacteria?
By denaturing proteins in bacteria
What is the percentage contribution of protein metabolism to energy requirements after several hours of physical work?
Up to 12%
What is the major end product of nitrogen metabolism in humans and mammals?
Urea
How are dietary proteins initially denatured?
By gastric rennin
What kills most ingested bacteria in the upper part of the gut?
Gastric acid
Which enzymes divide the proteins into short peptides during protein digestion in the small intestine?
Trypsin, chymotrypsin, and elastase
What process describes the conversion of ammonia into urea?
Urea cycle
Where are amino acids absorbed from during protein breakdown?
Intestine to liver then to bloodstream
Learn about the two categories of proteins - fibrous and globular. Understand their properties and functions, including structural roles of fibrous proteins and functional roles of globular proteins like enzymes.
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