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Biology Mocks Paper 1 > Respiration > Flashcards

Flashcards in Respiration Deck (9)
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1
Q

Why do we need energy?

A
  • Movement.
  • Keep warm.
  • Chemical reactions to build larger molecules.
2
Q

What is the process in which we are supplied with energy?

A
  • Cellular Respiration.
  • Exothermic reaction.
  • Takes place continually in all living cells.
3
Q

What is the equation for respiration?

A
  • Glucose + Oxygen –> Carbon Dioxide + water.
4
Q

Why does aeorobic respiration releases a great deal of energy?

A
  • Glucose molecules are fully oxidised.
5
Q

What happens if there is not enough oxygen?

A
  • Anarobic respiratipn.
6
Q

Anaerobic respiration in muscle cells:

A
  • Muscles need a great deal of energy for contraction.
  • Under certain coniditons: Amount of oxygen may be limited.
  • ## Shortage of oxygen: Muscle cells respire anaroebically.
7
Q

What is the equation for anaerobic respiration?

A

Glucose –> Lactic Acid.

  • During Anaerobic respiration in muscles:
  • Glucose is converted into lactic acid.
  • Does not require oxygen.
  • Releases less energy than aerobic respiration.
  • Because:
  • Oxidation of glucose is incomplete.
8
Q

Anaerobic respiration in plants and yeast cells:

A
  • Glucose –> Ethanol + Carbon dioxide.
  • Glucose is converted into ethanol and carbon dioxide.
  • No oxygen is needed.
9
Q

What is anearobic respiration in yeast called?

A
  • Fermentation.
  • Reaction is used to make: Alcholic drinks and beer.
  • Co2 in fermentation is useful to make bread.
  • Creates bubbles in the dough causing the bread to rise.