10 questions🇬🇧English
🏃 Aerobic & Anaerobic Respiration – Year 8
Biology · Year 8 (KS3) — word equations, mitochondria, lactic acid and fermentation in yeast
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Questions
In which part of a cell does most aerobic respiration take place?
Mitochondria
Nucleus
Ribosomes
Cell membrane
20s
Complete the word equation for aerobic respiration: glucose + oxygen →
ethanol + carbon dioxide
lactic acid
carbon dioxide + water
glucose + water
20s
Which statement correctly describes respiration rather than breathing?
A chemical reaction that releases energy from glucose
Pushing carbon dioxide out of the lungs
Taking in oxygen through the nose and mouth
Moving air into and out of the lungs
30s
During anaerobic respiration in human muscles, glucose is broken down into:
Oxygen
Carbon dioxide and water
Ethanol
Lactic acid
20s
Why do a sprinter's leg muscles start to respire anaerobically during a fast race?
Not enough oxygen reaches the muscles
The muscles run out of water
Too much oxygen reaches the muscles
The muscles stop needing energy
30s
What are the products when yeast respires anaerobically (fermentation)?
Lactic acid and oxygen
Ethanol and carbon dioxide
Carbon dioxide and water
Lactic acid only
20s
Why does bread dough containing yeast rise when left in a warm place?
Yeast releases oxygen gas that forms bubbles
Yeast releases carbon dioxide gas that forms bubbles
Yeast produces lactic acid that swells the dough
Warm air from the room soaks into the dough
30s
In brewing beer, which product of yeast fermentation is the one the brewer mainly wants?
Ethanol
Oxygen
Glucose
Lactic acid
30s
After a hard race, you keep breathing quickly for several minutes. What is this extra oxygen mainly used for?
Fermenting glucose into ethanol
Making more lactic acid in the muscles
Turning carbon dioxide into glucose
Breaking down the lactic acid that has built up
30s
Compared with aerobic respiration, how much energy does anaerobic respiration release from each glucose molecule?
Slightly more energy
Much less energy
Exactly the same energy
Much more energy
30s