This presentation covers OCR Gateway Biology 9-1 B1.2.4 Enzyme Reactions This PowerPoint is a whole lessons included with student activities and animated answers. Enzymes-catalysed reactions Rate of reaction Denaturing of enzymes and the active site Optimum temperature and optimum pH for enzymes Definition of concentration Increasing concentration of enzymes and substrates Saturation of substrates

This presentation covers OCR Gateway Biology 9-1 B1.2.3 Enzymes This PowerPoint is a whole lessons included with student activities and animated answers. Enzymes are made of protein. Enzymes are biological catalysts. Catalysts speed up the rate of reaction without being used up themselves. Enzymes and the lock and key hypothesis. Enzymes breaking down and bonding substrates.

This presentation covers OCR Gateway Biology 9-1 B1.3.3 Anaerobic Respiration This PowerPoint is a whole lessons included with student activities and animated answers. Recap of aerobic respiration Conditions for anaerobic respiration Word equation for anaerobic respiration in mammals Lactic acid and its affects. Oxygen debt Comparing aerobic and anaerobic respiration in mammals. Anaerobic respiration in plants - fermentation. Fermentation word equation and symbol equation. Exam questions.

This presentation covers OCR Gateway Biology 9-1 B1.4.4 Interaction of limiting factors This PowerPoint is a whole lessons included with student activities and animated answers. Experimental procedures to investigate how the rate of photosynthesis is affected by: Light level Temperature Carbon dioxide concentration Inverse square law for relative light intensity

This two lesson presentation covers OCR Gateway Biology 9-1 B1.4.2 Photosynthesis Experiments This PowerPoint is a whole lessons included with student activities and animated answers. The positive test for starch Experimental procedure for testing starch in leaves. Testing for the need of chlorophyll for photosynthesis. Testing for the need of light for photosynthesis. Testing for the need of carbon dioxide for photosynthesis. Testing oxygen produced via photosynthesis. Testing light intensity affects photosynthesis.

This presentation covers OCR Gateway Biology 9-1 B2.1.1 Diffusion This PowerPoint is a whole lessons included with student activities and animated answers. Definition of diffusion from high concentration to lower concentration. What diffuses in and out of cells. How the rate of diffusion is affected by distance, surface area, and concentration gradient. How the human body has adapted to increase the rate of diffusion.

This presentation covers OCR Gateway Biology 9-1 B2.1.3 Active Transport This PowerPoint is a whole lessons included with student activities and animated answers. Definition of active transport Key features of active transport Against concentration gradient. ATP and respiration Protein carriers in cell membrane Active transport in plant cells - root hair cells Active transport and protein carriers

This presentation covers OCR Gateway Biology 9-1 B2.1.4 Mitosis This PowerPoint is a whole lessons included with student activities and animated answers. The cell cycle DNA replication Movement of chromosomes Cytokinesis (cell division) Growth of daughter cells.

This presentation covers OCR Gateway Biology 9-1 B2.1.5 Cell Differentiation This PowerPoint is a whole lessons included with student activities and animated answers. Describing the structure of the following cells: Sperm cell Fat cell Red blood cells Ciliated cells Palisade cells