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What type of organism is yeast?
Fungi
What sugar does yeast use for respiration?
Glucose
What gas makes bread dough rise?
CO2
Does yeast respire with or without oxygen in dough?
Without
Write the word equation for yeast respiration.
Glucose --> ATP + CO2 + Ethanol
What does CO₂ do inside the dough?
Makes it rise and creating the light, airy texture
Is temperature a biotic or abiotic factor?
Abiotic
What happens to yeast respiration when it is cold?
Significantly slows it down
What does “anaerobic” mean?
No oxygen needed
Explain why more CO₂ is produced at the optimum temperature.
More is produced at an optimum temperature primarily because that temperature provides the perfect environment for the enzymes involved in metabolic processes
Link respiration rate to gas volume in bread dough.
higher yeast respiration equals faster carbon dioxide production, which leads to a quicker increase in gas volume (dough expansion).
Why doesn’t ethanol make the bread rise?
because it stays in liquid form inside the dough, while the gas needed for lifting the bread is carbon dioxide.
What is the role of enzymes in yeast respiration?
Tiny, specialized, high-speed workers (or tools) that make chemical reactions happen instantly
Explain why very high temperatures stop gas production.
because it kills or disables they east that make the gas.
Why might dough not rise in a hot car?
Yeast is a living organism, and when exposed to temperatures that are too high, it stops working or dies, causing the bread to fail.
