TestUstad
Fairly easy

Anaerobic respiration in human cells produces

Correct answer: B. lactate only, with no carbon dioxide

  • A. ethanol and carbon dioxide
  • B. lactate only, with no carbon dioxide
  • C. lactate and abundant carbon dioxide
  • D. ethanol and lactate together

Explanation

Human muscle cells reduce pyruvate straight to lactate, releasing no CO2, whereas yeast decarboxylates pyruvate to ethanol and CO2. Confusing the two fermentation types is a standard trap, so remember muscles make lactate, not bubbles.

Written and checked by , contributorLast updated
Report an error

The more specific you are, the faster it gets fixed. A source beats an opinion.

Prefer email? support@testustad.com

About Cellular Respiration

Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.

Practise Bioenergetics

1,378 free Bioenergetics MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.

Start a free Bioenergetics testAll Bioenergetics MCQs

Discussion

Stuck on an option, or know a faster way to get there? Ask or explain it here.

No comments yet. Be the first to explain this one.

Exams that ask Biology questions like this

Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.

DUHS Biology81 MCQsETEA MDCAT Biology81 MCQsKMU Biology81 MCQsMDCAT Biology81 MCQsLecturer Biology Test Biology80 MCQsSubject Specialist Biology Test Biology80 MCQsNUMS Biology55 MCQsBSN Entry Test Biology40 MCQs

More Cellular Respiration questions

The hydrogen atoms removed from glucose during glycolysis are accepted by

The cytochromes of the electron transport chain are

The correct order of the stages of aerobic respiration is

A marathon runner who trains at altitude increases the capacity of the blood to carry oxygen. The direct benefit to respiration is

Which two stages of aerobic respiration generate ATP directly by substrate level phosphorylation?

The reduced coenzyme NADH produced in glycolysis in the cytoplasm reaches the electron transport chain by