AQA A - Level BIOLOGY Paper 1 June 2026 TOPIC 1 – 4 EXAM GUIDE QNS & ANS (Complete And Verified Study material) (11pages) LEARNEXAMS

1. Define a biological molecule and provide examples. Answer: A biological molecule is a molecule that is involved in the functioning of a living organism. Examples include carbohydrates, lipids, proteins, and nucleic acids. 2. Explain the structure and function of carbohydrates in living organisms. Answer: Carbohydrates are organic compounds made up of carbon, hydrogen, and oxygen. They function as a source of energy and structural support in living organisms. 3. What is the role of lipids in cells? Answer: Lipids serve as a source of energy storage, insulation, and cell membrane structure in cells. 4. Describe the structure and function of proteins in organisms. Answer: Proteins are complex molecules made up of amino acids. They have a wide range of functions, including enzyme catalysis, transport, structural support, and defense. 5. What are nucleic acids and what role do they play in genetic information? Answer: Nucleic acids are macromolecules that store and transmit genetic information. Examples include DNA and RNA. 6. Explain the process of DNA replication