Cell biologyLesson 2 of 5 in the course Mitochondria and cellular respiration

Cellular Respiration: Glycolysis, Aerobic Pathways, and ATP Yield

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

Save course
Lesson progress
0 / 5

Your progress is kept in this browser only.Sign up to save it

Summary

Cellular respiration transfers chemical energy from nutrients into ATP, a form of energy cells can use. This lesson introduces the overall purpose of respiration and explains glycolysis, the first stage shared by aerobic respiration, anaerobic respiration, and fermentation.

Cellular respiration is a set of metabolic reactions that transfers energy from fuels such as glucose, fatty acids, and amino acids to ATP. Many respiration pathways pass electrons from fuel molecules to an electron acceptor. When oxygen is the acceptor, the process is aerobic; when another suitable molecule accepts electrons, it is anaerobic respiration.

All flashcards

What is cellular respiration?
A set of metabolic reactions that transfers energy from fuels to ATP.
What does catabolic mean?
Describes metabolism that breaks larger molecules into smaller ones.
What is substrate-level phosphorylation?
Direct transfer of a phosphate group to ADP to form ATP.
What is the proton motive force?
The electrochemical gradient formed across a membrane by proton pumping.
How does fermentation differ from anaerobic respiration?
Fermentation transfers electrons to organic molecules without an electron transport chain; anaerobic respiration uses a chain and a non-oxygen terminal acceptor.

Quiz questions

  1. What are the main products when pyruvate is converted to acetyl-CoA in eukaryotic cells?Answer: Acetyl-CoA, carbon dioxide, and NADH.
  2. What does one turn of the citric acid cycle yield per acetyl-CoA?Answer: Three NADH, one FADH2, and one GTP.
  3. What is oxygen's role at the end of the aerobic electron transport chain?Answer: It accepts electrons and combines with protons to form water.
  4. How does chemiosmosis contribute to ATP production?Answer: Proton flow through ATP synthase drives ATP formation from ADP and phosphate.
  5. Which statement describes anaerobic respiration?Answer: It uses an electron transport chain with a terminal acceptor other than oxygen.

Based on the Wikipedia article Cellular respiration, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

More in Cell biology

All Cell biology lessons
Cell biologyKinesin Structure, Motility, Regulation, and Cellular Roles5 flashcards · 5 quiz questions · 4 gamesPlay free →Cell biologyProkaryotic Cell Organization, Envelopes, and Appendages5 flashcards · 5 quiz questions · 4 gamesPlay free →Cell biologyCytoskeletal Filaments, Prokaryotic Systems, and Cellular Mechanics5 flashcards · 5 quiz questions · 4 gamesPlay free →Cell biologyActive and Vesicular Membrane Transport: Gradients, Pumps, and Bulk Transport5 flashcards · 5 quiz questions · 4 gamesPlay free →Cell biologyProkaryotic Binary Fission and FtsZ-Mediated Cytokinesis5 flashcards · 5 quiz questions · 4 gamesPlay free →Cell biologyProkaryotic and Eukaryotic Cell Features and Size Constraints5 flashcards · 5 quiz questions · 4 gamesPlay free →