Bioenergetics Flashcards
What is the definition of photosynthesis
What is the equation for photosynthesis
Carbon dioxide + water → glucose + oxygen
C 02 + H2 0 → C6 H12 O6 + O2
What factors effect the rate of photosynthesis and the amount of chlorophyll
Temperature
Light intensity
Carbon dioxide concentration
Describe what is ment by a limiting factor of photosynthesis
What is the inverse square law in context of photosynthesis
What are the uses of glucose produced from photosynthesis
• used for respiration
• converted into insoluble starch for storage
• used to produce fat or oil for storage
• used to produce cellulose, which strengthens the cell wall
• used to produce amino acids for protein synthesis.
What type of reaction is respiration.
Endothermic or exothermic
What do organisms need energy for
• chemical reactions to build larger molecules
• movement
• keeping warm.
What is the equation for aerobic respiration
glucose + oxygen → carbon dioxide + water
C6 H12 O6 + O2 → C O2 + H2 O
What is the equation for anaerobic respiration in muscles and yeast cells in plants (fermentation)
Muscles = glucose → lactic acid
Yeast cells = glucose → ethanol + carbon dioxide
What happens to the heart rate, breathing rate and breath volume while exercising and why
Increases to supply the working muscles with more oxygenated blood
How does the body remove excess lactic acid
Blood flowing through muscles transports the Lactic acid to the liver where its then converted back to glucose
What is the definition of metabolism
Metabolism is the sum of all the reactions in a cell or the body.
What are some reactions in the body that is metabolism
• conversion of glucose to starch, glycogen and cellulose
• the formation of lipid molecules from a molecule of glycerol and three molecules of fatty acids
• the use of glucose and nitrate ions to form amino acids which in turn are used to synthesise proteins
• respiration
• breakdown of excess proteins to form urea for excretion.
