[{"id": 1, "type": "multiple_choice", "options": ["A circular loop", "A triple helix", "A single strand", "A double helix"], "question": "What is the structure of DNA?", "correct_answer": "A double helix"}, {"id": 2, "type": "multiple_choice", "options": ["A triple helix", "A circular loop", "A double helix", "A single strand"], "question": "What is the structure of DNA?", "correct_answer": "A double helix"}, {"id": 3, "type": "multiple_choice", "options": ["A circular loop", "A triple helix", "A double helix", "A single strand"], "question": "What is the structure of DNA?", "correct_answer": "A double helix"}, {"id": 4, "type": "multiple_choice", "options": ["Covalent bond", "Metallic bond", "Ionic bond", "Hydrogen bond"], "question": "What type of bond involves the sharing of electrons?", "correct_answer": "Covalent bond"}, {"id": 5, "type": "multiple_choice", "options": ["Metallic bond", "Hydrogen bond", "Ionic bond", "Covalent bond"], "question": "What type of bond involves the sharing of electrons?", "correct_answer": "Covalent bond"}]