Lesson 7.3.1
7.3.1 Lactate after anaerobic respiration Quiz: Pearson Edexcel Biology, Unit 7
20 questions
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Lesson 7.3.1, Lactate after anaerobic respiration: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 7: Run for your Life, written with Revision Ninja.
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The 20 questions
-
Which enzyme converts pyruvate to lactate during anaerobic respiration in animals?
- Pyruvate decarboxylase
- Lactate dehydrogenase
- ATP synthase
- Citrate synthase
-
Which molecule is regenerated during the conversion of pyruvate to lactate?
- NAD+
- ATP
- Oxygen
- Reduced FAD
-
What substance is lactate converted into by the liver after exercise?
- Glycerol
- Carbon dioxide
- Ethanol
- Glucose
-
Which organ is the primary site for converting lactate back into glucose?
- Liver
- Spleen
- Kidney
- Pancreas
-
What is the primary cause of oxygen debt following intense exercise?
- Protein synthesis
- Lactate oxidation
- ATP breakdown
- Glucose hydrolysis
-
Why does blood lactate concentration rise during a short, high-intensity sprint?
- Rapid glycolysis
- Fat oxidation
- Slow glycolysis
- Aerobic respiration
-
Which pathway describes the transport and recycling of lactate between muscle and liver?
- Krebs cycle
- Ornithine cycle
- Calvin cycle
- Cori cycle
-
Which molecule is reduced to form lactate during anaerobic respiration in animals?
- Glucose
- Oxaloacetate
- Pyruvate
- Acetyl CoA
-
What essential coenzyme is regenerated when pyruvate is reduced to lactate?
- NAD+
- Coenzyme A
- ATP
- FAD
-
Why does lactate accumulation lead to muscle fatigue during intense exercise?
- Raises muscle pH
- Lowers muscle pH
- Destroys actin filaments
- Blocks nerve impulses
-
What term describes the extra oxygen required after exercise to clear lactate?
- Tidal volume
- Basal metabolic rate
- Oxygen debt
- Oxygen capacity
-
Why is lactate not classified as an unusable metabolic waste product?
- It is excreted
- It is stored
- It is recyclable
- It is toxic
-
Which enzyme catalyses the conversion of pyruvate to lactate in anaerobic respiration?
- ATP synthase
- Pyruvate decarboxylase
- Isocitrate dehydrogenase
- Lactate dehydrogenase
-
Which ion accumulates alongside lactate during anaerobic exercise to decrease muscle pH?
- Sodium ions
- Potassium ions
- Hydrogen ions
- Calcium ions
-
In which part of the cell is lactate formed from pyruvate?
- Cytoplasm
- Nucleus
- Cristae
- Mitochondrial matrix
-
Which type of muscle fibre produces lactate most rapidly during intense activity?
- Smooth
- Slow twitch
- Cardiac
- Fast twitch
-
What is the net yield of ATP per glucose molecule in anaerobic respiration?
- 32 ATP
- 2 ATP
- 38 ATP
- 4 ATP
-
What can lactate be converted into so it can enter aerobic respiration?
- Acetyl CoA
- Oxaloacetate
- Citrate
- Pyruvate
-
How does cardiac muscle utilise lactate received from the blood?
- Excretes via urine
- Converts to glucose
- Polymerises to glycogen
- Respires aerobically
-
Which organ primarily removes lactate from the blood to convert it into glucose?
- Kidney
- Liver
- Spleen
- Pancreas
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