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GCSE Bioenergetics

GCSE Bioenergetics (Topic 4 AQA Combined Science) Flashcards

QuestionAnswer
Photosynthesis An endothermic reaction in which energy is transferred to chloroplasts from the environment by light
Photosynthesis word equation carbon dioxide + water → glucose + oxygen
Photosynthesis symbol equation 6CO2+6H2O→C6H12O6+6O2
4 uses of glucose in plants 1. Respiration 2. Strengthening cell walls 3. Protein synthesis 4. Energy storage
4 factors that increase the rate of photosynthesis 1. Light intensity 2. Temperature 3. CO2 concentration 4. Amount of chlorophyll
Inverse square law light intensity ⍺ 1/distance²
4 ways to maximise the rate of photosynthesis in a greenhouse 1. Ventilation 2. Lamps 3. Shades 4. Paraffin heaters
Respiration the process of transferring energy from glucose. Its an exothermic reaction that goes on continuously in living cells
3 ways energy transferred is used in all living processes 1. Muscle contraction 2. To keep warm 3. To build up larger molecules from smaller ones
Aerobic Respiration Respiration using oxygen. It's the most efficient type of respiration
Aerobic Respiration word equation glucose + oxygen → carbon dioxide + water + energy
Aerobic Respiration symbol equation C6H12O6 + 6O2 → 6CO2 + 6H2O
Anaerobic Respiration Respiration without oxygen. It transfers much less energy than aerobic respiration because glucose isn't fully oxidies
What is anaerobic respiration called in yeast cells? Fermentation
Metabolism The sum of all the reactions that happen in a single cell or the body. Metabolic reactions use energy from respiration to make new molecules
Metabolic reactions use energy from respiration to make new molecules, name 3 examples 1. Glucose and nitrate ions combine to make amino acids, then made into proteins 2. Lipids break down into glycerol and fatty acids 3. Glucose molecules join together to make bigger carbohydrates
3 things that increase to get more oxygen to your muscles 1. Heart rate 2. Breathing rate 3. Breath volume
Oxygen debt The amount of extra oxygen needed to react with built-up lactic acid and remove it from cells
Created by: Jascelectronic
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