Yeast are single-celled fungi. Like plants, they have a cell wall. However, unlike plants, they are unable to make their own food.
Like animals, they take in chemicals from their environment. These chemicals are respireTo engage in respiration, the energy-producing process inside living cells. to provide energy.
Humans have used yeast for many thousands of years for brewing and baking. Brewing uses anaerobic respiration. Baking uses aerobic respiration.
Structure functions common to animal cells:
Cell structure
Function
Cytoplasm
Where enzymes and other proteins are made. Location of reactions in anaerobic respiration.
Nucleus
Contains DNA which carries the genetic code for making enzymes and other proteins used in chemical reactions such as photosynthesis and respiration.
Cell membrane
Allows gases and water to diffuse freely into and out of the cell. Controls the transport of other molecules.
Mitochondrion (plural is mitochondria)
Contains enzymes for the reactions in aerobic respiration (in animals, plants and yeast).
Ribosome
Where amino acids are joined together to make a protein.
Cell structure
Cytoplasm
Function
Where enzymes and other proteins are made. Location of reactions in anaerobic respiration.
Cell structure
Nucleus
Function
Contains DNA which carries the genetic code for making enzymes and other proteins used in chemical reactions such as photosynthesis and respiration.
Cell structure
Cell membrane
Function
Allows gases and water to diffuse freely into and out of the cell. Controls the transport of other molecules.
Cell structure
Mitochondrion (plural is mitochondria)
Function
Contains enzymes for the reactions in aerobic respiration (in animals, plants and yeast).
Cell structure
Ribosome
Function
Where amino acids are joined together to make a protein.