This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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Here are the answers to your questions. Question 23: a) Solution B has a higher concentration of sugar molecules (solute) compared to solution A. Therefore, solution B is hypertonic. Solution B b) Water potential is inversely related to solute concentration. Solution A has a lower concentration of sugar molecules, meaning it has a higher water potential. Solution A c) Water molecules will move from an area of higher water potential to an area of lower water potential through a partially permeable membrane. Water will move from A to B. This is because solution A has a higher water potential (lower solute concentration) than solution B. d) The membrane separating the two solutions A and B is called a partially permeable membrane (or semi-permeable membrane). Partially permeable membrane e) An alternative setup to demonstrate osmosis is the thistle funnel experiment. Thistle funnel experiment using a visking tubing. Question 24: a) i) The peak of the pepsin curve is at approximately pH 2. Optimum pH for Pepsin: 2 ii) The peak of the pancreatic lipase curve is at approximately pH 8. Optimum pH for Pancreatic lipase: 8 b) i) Pepsin works best in a strongly acidic medium (pH 2). Pepsin ii) Pancreatic lipase works best in a slightly alkaline medium (pH 8). Pancreatic lipase c) The graph for "most enzymes" shows an optimum pH between 6 and 7. Two digestive enzymes that work best within this pH range are: Amylase Maltase d) The normal pH of the stomach is highly acidic (around 1.5-3.5), which is optimal for pepsin activity. If the pH in the stomach increased to 7 (neutral), pepsin would become denatured or its activity would significantly decrease. This would lead to impaired protein digestion in the stomach. Send me the next one 📸