Vitamin C deficiency may lead to scurvy, a disease characterized by skin lesions and blood vessel hemorrhages due to weakened connective tissue. Vitamin C deficiency has this effect because the vitamin is
A) a critical structural component of collagen.
B) required for the enzymatic activity of prolyl hydroxylase.
C) required for the enzymatic activity of cellulose synthase.
D) required for the enzymatic activity of hydroxyproline.
Correct Answer:
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Q9: The thin, sheetlike basal laminae are found
A)
Q10: The major protein of the extracellular matrix
Q11: Collagens commonly contain the three repeating amino
Q12: Basal laminae are a meshwork of fibrils
Q13: The smallest amino acid is
A) glycine.
B) proline.
C)
Q15: Connective tissue cells are connected to the
Q16: Integrins are
A) transmembrane proteins.
B) peripheral membrane proteins.
C)
Q17: Integrins bind to
A) collagen, laminin, and fibronectin.
B)
Q18: The major cell surface receptor(s) responsible for
Q19: Cell adhesion molecules can be divided into
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