2.38 Anaerobic respiration and food production

What is the equation for anaerobic respiration in animals?

Glucose -> lactic acid + a little bit of energy

What is the equation for anaerobic respiration in fungi and plants?

Glucose -> ethanol + carbon dioxide + some energy

When does anaerobic respiration happen?

When cells do not have enough oxygen for aerobic respiration to take place (eg. during vigorous exercise)

What role does carbon dioxide have in bread making?

The carbon dioxide creates air spaces in the dough causing it to rise

How could you measure the rate of anaerobic respiration in yeast?

Collect gas produced or count gas bubbles

How can you improve reliability?

Carry out more repeats

How many ATP are produced during anaerobic respiration?

2

How many ATP are produced during aerobic respiration?

36

When making yoghurt, why do you heat it to 90*C first?

To kill unwanted bacteria

When making yoghurt, what causes the milk to coagulate?

The bacteria respires and produces lactic acid

When making yoghurt, why is the milk kept at 45*C after adding the bacteria culture?

Optimum temperature for bacteria to carry out reactions

When making yoghurt, what microorganism is used?

Bacteria called Lactobacillus

When making yoghurt, why is the solution eventually cooled to 5*C?

To stop bacteria from continuing to grow and producing lactic acid

When making bread, what microorganism is used?

Yeast

What is the substance responsible for aching muscles after vigorous exercise?

Lactic Acid

Bacteria do not have nuclei, what can we call them?

Prokaryotes

Yeast do have nuclei, what can we call them?

Eukaryotes

What kingdom are yeast cells a member of?

Fungi

aerobic respiration

Respiration that requires oxygen

anaerobic respiration

Respiration that does not require oxygen

ATP

The form of energy is transferred in during respiration

What is the balanced chemical symbol equation for aerobic respiration?

C6H12O6 + 6O2 -> 6CO2 + 6H2O