Equations
Name the sugar that used in respiration.
Glucose.
What is the test used to test for the presence of carbon dioxide?
Limewater which turns cloudy.
Name one factor that can impact respiration.
Temperature.
True or False: Cells only respire when we are awake.
False - Cells respire 24 hours per day.
What is the name of the process that happens in the absence of oxygen?
Fermentation.
What gas must be present for aerobic respiration to take place?
Oxygen.
Describe a suitable control experiment instead of using germinating peas.
Using glass beads instead of germinating peas.
Name the apparatus used to measure the rate of respiration.
A respirometer.
What happens to the rate of respiration as we increase temperature?
It increases.
What product is produced during plant fermentation that is used in the drinks industry?
Alcohol.
State the word equation for aerobic respiration.
Glucose + oxygen -> energy + carbon dioxide + water
What happened to the coloured liquid in the respirometer as the germinating peas respired?
The coloured liquid moved along the capillary tube.
What do most organisms need to survive?
A food source or Oxygen.
Name the temperature at which respiration happens the most?
Optimum temperature.
Name the waste product of animal fermentation.
Lactate.
State the equation for fermentation in plants.
Sugar + energy -> energy + alcohol + carbon dioxide.
What is a control experiment?
Where all the factors are kept the same, except the factor being investigated.
State two reasons why cells need energy.
Growth, repair, movement, maintain body temperature.
What is cellular respiration controlled by?
A series of enzymes.
What is placed on top of the glucose solution in the yeast experiment to stop oxygen getting in?
A layer of oil.
State the equation for fermentation in animals.
Glucose -> energy + lactate
True or False - Cobalt blue paper turns from blue to green in the presence of water.
False. It turns from blue to pink.
Give an example as to why we need cells to grow and repair.
Heal wounds, replace red blood cells.
Why are germinating peas used to show respiration and not dried peas?
As they are still growing and require energy.
In the yeast experiment, why is glucose solution boiled first?
To remove oxygen.