Unit 2 · Chemical and Cellular Basis of Life

A/L Biology

• Chemical elements and water in living systems
• Carbohydrates
• Lipids
• Amino acids and proteins
• Nucleic acids: DNA, RNA and ATP
• Enzymes
• Cell theory and microscopy
• Prokaryotic and eukaryotic cells
• Cell organelles and plant versus animal cells
• Cell membrane and transport across membranes
• The cell cycle and mitosis
• Meiosis and its significance
• Photosynthesis
• Cellular respiration