Sub-topic 1
2025 · National One-Eighth
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Testing a leaf for starch (photosynthesis)
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Sub-topic 2
2025 · National One-Eighth
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Digestion in the stomach: chyme and gastric enzymes
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Sub-topic 3
2026 · National Preliminary
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Digestion in the stomach: chyme and gastric enzymes
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Sub-topic 4
2026 · National One-Eighth
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Photosynthesis: light-independent reactions (calvin cycle)
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Sub-topic 5
2025 · National One-Eighth
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Photosynthesis and respiration: the compensation point
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Sub-topic 6
2024 · National Preliminary
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Photosynthesis and respiration: the compensation point
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Sub-topic 7
2025 · National One-Eighth
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Edible parts of plants: roots, stems, leaves, flowers and fruits
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Sub-topic 8
2025 · National One-Eighth
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Malnutrition and macromolecule deficiency diseases
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Sub-topic 9
2025 · National One-Eighth
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Photosynthetic pigments, absorption spectrum and photoreceptors
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Sub-topic 10
2025 · National One-Eighth
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Photosynthesis and cellular respiration: sites and coenzymes
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Sub-topic 11
2025 · National One-Eighth
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Photosynthesis and cellular respiration: sites and coenzymes
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Sub-topic 12
2024 · National Preliminary
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Modes of nutrition in bacteria and microorganisms
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Sub-topic 13
2024 · National Preliminary
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Cam photosynthesis and stomatal behaviour in xerophytes, mesophytes and hydrophytes
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Sub-topic 14
2024 · National Preliminary
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Essential mineral elements in plants and their physiological roles
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Sub-topic 15
2026 · National One-Eighth
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Photolysis of water in photosynthesis: essential mineral cofactors (manganese and chloride)
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Sub-topic 16
2026 · National Preliminary
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The liver as the organ that produces bile
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Sub-topic 17
2025 · National Preliminary
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Water as the electron donor replacing psii's lost electron
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Sub-topic 18
2026 · National Preliminary
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The liver as the organ that produces bile
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Sub-topic 19
2026 · National Quarterfinal
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Peristalsis: muscular waves moving food along the digestive tract
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Sub-topic 20
2026 · National One-Eighth
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Digestion: peristalsis moving food along the gut
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Sub-topic 21
2026 · National One-Eighth
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Digestive system: cardiac (lower oesophageal) sphincter
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Sub-topic 22
2026 · National One-Eighth
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Human nutrition: mass of food for a given energy requirement
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Sub-topic 23
2026 · National One-Eighth
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Plant mineral nutrition: nitrogen and leaf growth
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Sub-topic 24
2026 · National One-Eighth
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Digestive hormones: gastrin and gastric acid secretion
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Sub-topic 25
2026 · National Preliminary
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Digestive hormones: gastrin and gastric acid secretion
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Sub-topic 26
2026 · National Preliminary
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Digestive hormones: gastrin and gastric acid secretion
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Sub-topic 27
2026 · National Preliminary
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Digestive hormones: gastrin and gastric acid secretion
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Sub-topic 28
2018 · National Preliminary
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How animals acquire nitrogen through diet
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Sub-topic 29
2025 · National Quarterfinal
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Food biochemistry: gluten in wheat grain
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Sub-topic 30
2025 · National Quarterfinal
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Percentage sugar concentration in a mixed juice blend
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Sub-topic 31
2024 · National Final
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Percentage sugar concentration in a mixed juice blend
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Sub-topic 32
2025 · National Quarterfinal
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Misconceptions about recommended daily amounts (rda)
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Sub-topic 33
2024 · National Final
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Misconceptions about recommended daily amounts (rda)
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Sub-topic 34
2023 · National One-Eighth
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Photorespiration as the key difference between c3 and c4 plants
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Sub-topic 35
2023 · National One-Eighth
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Removing carbon dioxide in a photosynthesis control experiment
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Sub-topic 36
2023 · National One-Eighth
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Digestive system: the caecum and gut symbionts
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Sub-topic 37
2023 · National One-Eighth
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Manganese in the oxygen-evolving complex of photosynthesis
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Sub-topic 38
2024 · National Preliminary
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Manganese in the oxygen-evolving complex of photosynthesis
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Sub-topic 39
2021 · National Preliminary
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Problem of the day: sequencing a food-poisoning outbreak
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Sub-topic 40
2024 · National One-Eighth
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Magnesium's role in converting light energy to chemical energy
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Sub-topic 41
2023 · National Final
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Pancreatic amylase completing starch digestion after salivary amylase is inactivated in the stomach
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Sub-topic 42
2023 · National Preliminary
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Problem of the day: limiting factors on a light-intensity vs photosynthesis-rate curve
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Sub-topic 43
2022 · National Preliminary
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Macronutrient deficiencies causing necrosis in leaf tissue
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Sub-topic 44
2003 · National Semifinal
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Hydroponics: growing plants in liquid nutrient culture without soil
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Sub-topic 45
2003 · National Semifinal
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Amylase is present in both saliva and intestinal secretions
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Sub-topic 46
2013 · National Preliminary
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The pyloric sphincter and regulation of gastric emptying
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Sub-topic 47
2013 · National Preliminary
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Relative gut length of carnivores versus herbivores (true/false)
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Sub-topic 48
2013 · National Semifinal
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Plants have simpler nutritional requirements than animals (true/false)
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Sub-topic 49
2014 · National Quarterfinal
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Fungi carry out extracellular digestion before absorption (true/false)
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Sub-topic 50
2014 · National Final
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Rumen microorganisms producing cellulase to digest cellulose for ruminants
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Sub-topic 51
2014 · National Final
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Carnivores have a shorter alimentary canal than herbivores (true/false)
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Sub-topic 52
2016 · National One-Eighth
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Gill rakers straining food particles from water in bony fish
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Sub-topic 53
2016 · National One-Eighth
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Protein-digesting enzymes do not act on starch (true/false)
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Sub-topic 54
2016 · National One-Eighth
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Protein-digesting enzymes do not act on starch to give amino acids (true/false)
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Sub-topic 55
2016 · National One-Eighth
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Protein-digesting enzyme has no action on starch, due to substrate specificity (true/false)
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Sub-topic 56
2017 · National Quarterfinal
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Protein-digesting enzymes have no action on starch (true/false)
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Sub-topic 57
2020 · National Preliminary
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Limited absorption of water, simple sugars and some medicines in the stomach
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Sub-topic 58
2021 · National Preliminary
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Tapeworms exhibit parasitic nutrition, absorbing nutrients through their body surface
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Sub-topic 59
2021 · National Quarterfinal
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True or false: nadph synthesis occurs on the outer (stromal) face of the thylakoid membrane
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Sub-topic 60
2021 · National Quarterfinal
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True or false: atp synthesis occurs on the outer (stromal) face of the thylakoid membrane
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Sub-topic 61
2021 · National Quarterfinal
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True or false: photolysis of water occurs on the inner (lumen-facing) side of the thylakoid membrane
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Sub-topic 62
2022 · National Preliminary
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Phytophagous insects feed on plant sap and other plant parts
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Sub-topic 63
2023 · National Preliminary
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The four layers of the human digestive tract wall: mucosa
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Sub-topic 64
2023 · National Preliminary
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The four layers of the human digestive tract wall: submucosa
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Sub-topic 65
2023 · National Preliminary
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The four layers of the human digestive tract wall: serosa
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Sub-topic 66
2023 · National Preliminary
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Problem of the day: light as a limiting factor on a photosynthesis-rate-vs-light-intensity curve
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Sub-topic 67
2023 · National One-Eighth
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True or false: minimum peristalsis occurs in the oesophagus
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Sub-topic 68
2023 · National One-Eighth
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True or false: minimum peristalsis occurs in the duodenum
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Sub-topic 69
2023 · National One-Eighth
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True or false: minimum peristalsis occurs in the rectum
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Sub-topic 70
2023 · National Quarterfinal
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The vertebrate stomach's actual function is food storage
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Sub-topic 71
2023 · National Quarterfinal
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The major difference between c3 and c4 plants is photorespiration avoidance
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Sub-topic 72
2023 · National Quarterfinal
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Potassium hydroxide is used to remove co2 in photosynthesis control experiments
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Sub-topic 73
2023 · Regional Championship
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The gall bladder stores bile produced by the liver
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Sub-topic 74
2023 · Regional Championship
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Bile is a liver secretion that emulsifies fat
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