The 3.1.9. Distinguish between an essential and a non-essential amino acid. question bank gives IB Sports, exercise and health science (SEHS) students Standard Level (SL) and Higher Level (HL) authentic exam-style practice that mirrors IB Paper 1A, 1B, 2 structure and difficulty. Covering key syllabus areas such as core principles, advanced applications, and practical problem-solving, this resource builds confidence by training students in the same style of questions set by IB examiners. With instant solutions, detailed explanations, and syllabus-aligned practice, RevisionDojo helps students sharpen problem-solving skills and prepare effectively for mocks and final assessments. More than just practice, this question bank teaches students how to think the way IB examiners expect.