Lactase is an enzyme located in the membranes of epithelial cells that line the small intestine. This enzyme consists of a single polypeptide that folds into three regions. What type of amino acid would be present in each of these three regions?
- Aoutside cell: hydrophilic; inside the membrane: hydrophobic; inside the cell: hydrophilic
- Boutside cell: hydrophilic; inside the membrane: hydrophobic; inside the cell: hydrophobic
- Coutside cell: hydrophobic; inside the membrane: hydrophilic; inside the cell: hydrophobic
- Doutside cell: hydrophobic; inside the membrane: hydrophobic; inside the cell: hydrophilic