Which statement about digestion is true?
A) Bacteria in the human gut produce vitamin K and biotin.
B) Hydrolytic enzymes build macromolecules from monomers.
C) The stomach typically contains a large surface area, increased by folds and villi, for absorption of nutrients.
D) The human body contains more human cells than bacterial cells.
E) The gut epithelium of leeches in the genus Hirudo secretes enzymes that digest the proteins in the blood they suck from vertebrates.
Correct Answer:
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