Biology (Combined Science) · GCSE · OCR · OCR GCSE Combined Science A (Gateway Science) — Biology — Higher (J250) · Specification point · B1.3 · Cell level systems
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B1.3 Respiration
Summary Metabolic processes such as respiration are controlled by enzymes. Organic compounds are used as fuels in cellular respiration to allow the other chemical reactions necessary for life. Underlying knowledge and understanding Learners should have some underpinning knowledge of respiration. This should include that respiration involves the breakdown of organic molecules to enable all the other chemical processes necessary for life. Learners should be able to recall the word equation for respiration.
Common misconceptions Learners commonly hold the misconception that ventilation is respiration. They can also get confused between the terms breakup and breakdown.
| Learning outcomes | To include | Maths | Working scientifically | Practical suggestions |
|---|---|---|---|---|
B1.3a describe cellular respiration as a universal chemical process, continuously occurring in all living cells that supply ATP | WS1.2a | |||
B1.3b describe cellular respiration as an exothermic reaction
WS1.2b |
Demonstration of an exothermic reaction (e.g. heat pack). |
B1.3c compare the processes of aerobic and anaerobic respiration | in plants/fungi and animals the different conditions, substrates, products and relative yields of ATP | WS2a, WS2b, WS2c, WS2d | Research into whether plants respire. (PAG B3, PAG B4) Investigation of fermentation in fungi. (PAG B3) Investigation of respiration in yeast using alginate beads to immobilize the fungus. (PAG B3) |
B1.3d explain the importance of sugars in the synthesis and breakdown of carbohydrates | to include use of the terms monomer and polymer | Demonstration of the synthesis and breakdown of biological molecules (e.g. using Lego bricks). Qualitative testing of biological molecules PAG B2 |
B1.3e explain the importance of amino acids in the synthesis and breakdown of proteins | to include use of the terms monomer and polymer | Qualitative testing of biological molecules PAG B2 |
B1.3f explain the importance of fatty acids and glycerol in the synthesis and breakdown of lipids | Qualitative testing of biological molecules PAG B2 |