Respiration Flashcards
Define the term respiration.
a chemical reaction that takes place in living cells
It releases energy from glucose
How do living organisms use the energy released during respiration?
muscle contraction
protein synthesis
cell division
active transport
growth
maintaining a constant body temperature
In an investigation into the effect of temperature on respiration in yeast, which variables would need to be controlled?
volume of yeast suspension
number of cells present in the yeast suspension
type of sugar provided
concentration of sugar solution
pH
availability of oxygen
How would a temperature increase affect the rate of respiration in yeast cells?
An increase in temperature would cause an increase in the rate of respiration in yeast cells.
This trend would continue until around 40°C, above which the rate of respiration would slow down due to denaturing enzymes.
Define the term aerobic respiration.
a cellular reaction that uses oxygen to break down nutrients in order to release energy.
hat is the word equation for aerobic respiration?
glucose + oxygen → carbon dioxide + water
What is the balanced chemical equation for aerobic respiration?
C6H12O6 + 6O2 → 6CO2 + 6H2O
What is anaerobic respiration?
the chemical reaction in cells that breaks down nutrient molecules to release energy in the absence of oxygen
it releases much less energy per glucose molecule than aerobic respiration
What is the word equation for anaerobic respiration in yeast?
glucose → alcohol + carbon dioxide
What is the balanced chemical equation for anaerobic respiration in yeast?
C6H12O6 → 2C2H5OH + 2CO2
What is the word equation for anaerobic respiration in muscles?
glucose → lactic acid
