M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which scientist proposed the fluid mosaic model of plasma membrane? (A) Watson and Crick (B) Singer and Nicolson (C) Robert Hooke (D) Darwin 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Singer and Nicolson Explanation: Singer and Nicolson proposed the fluid mosaic model in 1972.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which of the following is a steroid hormone? (A) Insulin (B) Testosterone (C) Glucagon (D) Oxytocin 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Testosterone Explanation: Testosterone is a steroid hormone derived from cholesterol.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which plant tissue is responsible for secondary growth? (A) Apical meristem (B) Intercalary meristem (C) Lateral meristem (D) Parenchyma 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (C) Lateral meristem Explanation: Lateral meristem increases girth of plant.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which of the following is a polysaccharide? (A) Glucose (B) Fructose (C) Sucrose (D) Starch 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (D) Starch Explanation: Starch is a polysaccharide made of glucose units.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which process occurs in mitochondria? (A) Glycolysis (B) Krebs cycle (C) Transcription (D) Translation 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Krebs cycle Explanation: Krebs cycle occurs in mitochondrial matrix.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which structure is responsible for filtration in kidney? (A) Bowman's capsule (B) Glomerulus (C) Loop of Henle (D) Collecting duct 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Glomerulus Explanation: Glomerulus filters blood under pressure.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which of the following is a nitrogenous base in DNA? (A) Uracil (B) Thymine (C) Xanthine (D) Hypoxanthine 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Thymine Explanation: Thymine is present in DNA, uracil in RNA.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which phase of meiosis shows crossing over? (A) Prophase I (B) Metaphase I (C) Anaphase I (D) Telophase I 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (A) Prophase I Explanation: Crossing over occurs in pachytene stage of Prophase I.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which vitamin is essential for RBC formation? (A) Vitamin A (B) Vitamin B12 (C) Vitamin C (D) Vitamin D 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Vitamin B12 Explanation: Vitamin B12 is needed for RBC maturation.
M Mr. Dubey 🎓 Coach ⭐ 104.48K Points 📊 Biology Q. Which organ secretes bile? (A) Pancreas (B) Liver (C) Gall bladder (D) Stomach 👁️ Show Answer 💬 Discuss 🔗 Share ✅ Correct Answer: (B) Liver Explanation: Liver produces bile; gall bladder stores it.