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Here’s a NEET Biology quiz with questions and answers explained: Question 1: Which of the following is not a part of the human respiratory system? a) Trachea b) Pharynx c) Alveoli d) Stomach Answer: d) Stomach Explanation: The respiratory system includes organs involved in breathing, such as the trachea, pharynx, and alveoli. The stomach is part of the digestive system, not the respiratory system. Question 2: Which part of the brain controls the balance and coordination of muscles? a) Cerebrum b) Cerebellum c) Medulla oblongata d) Thalamus Answer: b) Cerebellum Explanation: The cerebellum is responsible for regulating voluntary movements, including balance, coordination, and muscle tone. It works with the motor cortex to perform these functions. Question 3: Which of the following is a nitrogenous base found in RNA but not in DNA? a) Adenine b) Guanine c) Thymine d) Uracil Answer: d) Uracil Explanation: In RNA, the nitrogenous base uracil replaces thymine, which is found in DNA. Therefore, uracil is not present in DNA. Question 4: Which of the following is an example of a vestigial organ in humans? a) Appendix b) Heart c) Lungs d) Kidneys Answer: a) Appendix Explanation: The appendix is a vestigial organ in humans. It is a remnant of a structure that was functional in some of our ancestors but has little to no function in modern humans. Question 5: In the process of photosynthesis, which pigment is responsible for capturing light energy? a) Chlorophyll b) Carotenoids c) Xanthophyll d) Phycocyanin Answer: a) Chlorophyll Explanation: Chlorophyll is the primary pigment in plant cells that captures light energy during photosynthesis. It absorbs mainly blue and red wavelengths and reflects green, which is why plants appear green. Question 6: What is the primary function of the large intestine? a) Digestion of proteins b) Absorption of nutrients c) Absorption of water and salts d) Secretion of digestive enzymes Answer: c) Absorption of water and salts Explanation: The primary function of the large intestine is to absorb water, salts, and some vitamins from undigested food. It also compacts the waste into feces. Question 7: Which of the following is not a function of the lymphatic system? a) Transport of lymph b) Production of red blood cells c) Immune response d) Absorption of fats Answer: b) Production of red blood cells Explanation: The production of red blood cells occurs in the bone marrow, not in the lymphatic system. The lymphatic system is responsible for transporting lymph, immune responses, and absorbing fats. Question 8: In which part of the plant does photosynthesis primarily occur? a) Roots b) Stem c) Leaves d) Flowers Answer: c) Leaves Explanation: Photosynthesis occurs mainly in the leaves of the plant. The leaves contain chloroplasts with chlorophyll, which capture light energy to convert carbon dioxide and water into glucose and oxygen. Question 9: Which of the following is the main function of hemoglobin in red blood cells? a) Transport of oxygen b) Storage of nutrients c) Digestion of food d) Fighting infections Answer: a) Transport of oxygen Explanation: Hemoglobin is a protein found in red blood cells that binds to oxygen in the lungs and carries it to tissues and organs throughout the body. It also helps in transporting carbon dioxide back to the lungs. Question 10: Which of the following hormones is produced by the pancreas to regulate blood sugar levels? a) Insulin b) Thyroxine c) Adrenaline d) Estrogen Answer: a) Insulin Explanation: Insulin is produced by the pancreas and helps regulate blood sugar levels by facilitating the uptake of glucose into cells, reducing blood sugar levels. This quiz covers various important Biology concepts that could be relevant for NEET preparation. Let me know if you'd like more!