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biology paper 1- 2024 Exam with verifie question and the best answers
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biology paper 1- 2024 Exam with verifie question and the best answers 1. The ratio of saturated to unsaturated fatty acids in a cell-surface membrane determines the extent of the membrane's fluidity. Suggest and explain why there was more phagocytosis. [3 marks]: 1. More unsaturated fatty acids increases fluidity (in (cell-surface membrane); 2. (Making cell-surface) membrane more fluid/ flexible; 3. Easy to engulf; 2. Describe the processes of facilitated diffusion and active transport. [3 marks]: 2. (Facilitated diffusion) movement down a concentration gradient via carrier/channel protein; 3. (Active transport) movement against a concentration gradient via carrier protein using ATP; 3. What are microvilli?
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