[{"id": 1, "type": "multiple_choice", "options": ["Cell membrane", "Mitochondria", "Ribosome", "Nucleus"], "question": "What organelle is known as the \"powerhouse of the cell\"?", "correct_answer": "Mitochondria"}, {"id": 2, "type": "multiple_choice", "options": ["Hard, soft, medium", "Large, small, tiny", "Igneous, sedimentary, metamorphic", "Red, gray, black"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 3, "type": "multiple_choice", "options": ["Mitochondria", "Cell membrane", "Nucleus", "Ribosome"], "question": "What organelle is known as the \"powerhouse of the cell\"?", "correct_answer": "Mitochondria"}, {"id": 4, "type": "written_response", "question": "Explain the scientific concept covered in \"DNA and Heredity Quiz\" and provide a real-world example.", "correct_answer": null}, {"id": 5, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}, {"id": 6, "type": "multiple_choice", "options": ["Hard, soft, medium", "Igneous, sedimentary, metamorphic", "Red, gray, black", "Large, small, tiny"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 7, "type": "multiple_choice", "options": ["Large, small, tiny", "Igneous, sedimentary, metamorphic", "Hard, soft, medium", "Red, gray, black"], "question": "What are the three types of rocks?", "correct_answer": "Igneous, sedimentary, metamorphic"}, {"id": 8, "type": "true_false", "question": "The scientific method always begins with making an observation or asking a question.", "correct_answer": "True"}]