Cellular RespirationHESI A2 cheat sheet

Sugar into ATP

7 key facts 5 practice questions Reviewed Oct 2026

Test yourself Save in app

The 1-minute sheetCinnaEntry

The Equation

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + ATP

The Stages

Glycolysis — in the cytoplasm, glucose → 2 pyruvate, small ATP yield
Krebs cycle — mitochondrial matrix, releases CO₂
Electron transport chain — inner membrane, the big ATP payoff, O₂ is the final acceptor

Yield

Aerobic ≈ 36–38 ATP per glucose

Anaerobic

No oxygen → fermentation, only 2 ATP
Lactic acid in muscle; ethanol in yeast

Key takeaway

Sugar into ATP

Before you read

Test yourself first: 5 questions

Question 1 of 5

Which best describes cellular respiration?

CinnaEntry app: the study feed with a practice question

Study Cellular Respiration in the appTEAS 7 and HESI A2 question banks with a rationale on every answer and timed practice tests.See how CinnaEntry works

Start free

Want more HESI Biology questions?We'll email you a free set on Cellular Respiration. No account needed.

Was this helpful?

Free to start

Know cellular respiration cold

TEAS 7 and HESI A2 question banks with a rationale on every answer and timed practice tests.

TEAS 7 & HESI A2 question banks
Rationale on every answer
Timed full-length practice tests
300+ cheat sheets

Start free on the web Download on theApp Store Get it onGoogle Play

See how CinnaEntry works