princeofpowerjr
16.10.2020 •
Biology
1 point
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Which of the following correctly describes how epithelial tissues gets nourishment?
From blood vessels deep to the basal layer.
Epithelial tissue does not need nourishment, it is dead.
From blood vessels scattered throughout the cells.
From the air surrounding the apical surface.
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Ответ:
From the air surrounding the apical surface.
Ответ:
polypeptides
Explanation:
Amino acids generally represent the building blocks of proteins. In order words, proteins are polymers of amino acids.
The amino acids in proteins are linked together by peptide bonds. A peptide bond is formed between two amino acids when the amine group of one of the amino acids combines with the carboxylic group of the other with the elimination of water. When the reaction involves multiple amino acids, multiple peptide or polypeptide, also known as protein is formed.