20 Questions
What are proteins composed of?
Amino acids
What is the principal constituent of the organs and soft structures of the animal body?
Proteins
What distinguishes the various proteins from a nutritional standpoint?
Amino acids makeup
What additional elements do proteins contain, apart from carbon, hydrogen, and oxygen?
Nitrogen and sulfur
What are amino acids?
A and B
Which of the following amino acids cannot be synthesized in the body at all or can only be synthesized in low amounts not sufficient to meet body requirements?
Histidine
For which animals are the 10 essential amino acids + glycine or serine and proline required in their diets?
Poultry
Which type of amino acid is used metabolically in the synthesis of proteins?
L-isomers
Which amino acids are most likely to be deficient in rations when primary energy feeds such as corn are low in these amino acids?
Lysine, methionine, tryptophan
Which category of amino acids forms about 44% of the body protein and can be synthesized in the animal body?
Non-essential (dispensable) amino acids
Which type of protein contains all the essential amino acids in proper amount and proportion?
Proteins of animal origin
Which proteins are considered to be of poor quality due to their lack of one or more essential amino acids?
Proteins of plant origin
What is the process by which intact dietary protein is broken down in the gastrointestinal tract?
Hydrolysis
Which part of the body is responsible for the synthesis of enzymes & hormones and the creation of an amino acid pool?
Tissues
What is the primary method of protein digestion in nonruminants?
Enzymatic digestion in the stomach
What happens to the ingested oligopeptides in the intestines?
They are absorbed directly into the intestinal mucosa and hydrolyzed by peptidases to amino acids.
Which type of feed is best for the rapid growth of ruminal microorganisms?
Cereals high in starch
What is the effect of high protein rations on the utilization of urea?
The utilization of urea decreases on high protein rations.
What is the relationship between the fiber content in feed and protein digestibility?
Increase in fiber content decreases the protein digestibility.
What stimulates microbial growth according to the text?
Energy-rich rations
Learn about the composition, physical properties, biological functions, and dietary importance of proteins as presented by Professor Dr. Mohammed Taher Ibrahim, a renowned expert in Nutrition and Clinical Nutrition at Suez Canal University, Egypt.
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