Скачать или смотреть 5 Predicted IGCSE Biology Paper 2 Questions for 2025 Exams

Question 1
Key hormones released by the placenta:
▪ Progesterone 🟡: Maintains uterine lining.
▪ Oestrogen 🟣: Promotes uterine and breast growth.
2. Check other options:
▪ FSH & LH ❌: Menstrual cycle hormones, not placenta.
▪ FSH & Progesterone ❌: FSH not from placenta.
▪ Oestrogen & LH ❌: LH not from placenta.
3. Conclusion:
▪ Correct answer: D (Progesterone & Oestrogen) ✅
So, D is the correct choice! 🎉

Questions 2
B. Exoskeleton 🦾
It's worth noting that:
• 🦗 Insects typically have three pairs of legs (six legs total).
• 🕷️ Arachnids have four pairs of legs (eight legs total).
• 🦋 Wings are present in many insects but not in arachnids.

Questions 3
🏋️ During exercise:
🔊 Glucagon is secreted from the pancreas
💪 Provides energy for muscles
🔄 Hormone action:
🏭 Causes the breakdown of glycogen stored in liver cells
📈 Increases the concentration of glucose in the bloodstream

Questions 4
 Gas exchange in the alveoli is considered a form of excretion because it involves the removal of waste products from the body. 🫁🚮 Excretion is defined as the process of removal waste products of metabolism and other non-useful materials from an organism's body 🌿➖♻️ such as carbon dioxide

Question 5
1.Identify the equation: Aerobic respiration of glucose.
▪ C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O 🌿➡️🌬️+💧
2. Number of glucose molecules: 2 🥖2x
3. CO₂ produced per glucose: 6 CO₂ 🥖➡️6🌬️
4. Calculate total CO₂ for 2 glucose:
▪ 6 CO₂ * 2 = 12 CO₂ 🌬️6x2=12
Answer: 12 molecules of CO₂ 🌬️=12

#igcsebiology #pastpapers #paper2 #igcse #examtips #kuwait #predictedpapers #2025