Friday, January 30, 2015 – Cellular Respiration Notes:


  • Where does Glycolysis occur?
  • What stage of cellular respiration is glycolysis?
  • The carbohydrate, glucose is broken down into what during glycolysis?
  • What else is produced during glycolysis?
  • How many ATP molecules are produced in glycolysis?
    “Glykos”= sweet; “lysis”=split apart
    Occurs in cytoplasm
  • Requires 2 ATP to get started
    Produces 4 ATP (net gain 2ATP)
    Produces 2 NADH
  • Interesting Fact:
  • Earliest fossil bacteria (3.5 billion years ago) but large amounts of oxygen not present until 2.7 BYA
    • Works without oxygen
    ~suggests ancient prokaryotes probably used glycolysis to make ATP before oxygen was present
  • • happens in cytoplasm without mitochondria


  • Where does the Krebs Cycle occur?
  • What is used to make CO2, NADH, ATP, and FADH2?
  • How many times does the Krebs Cycle turn, Why?
  • How many molecules of CO2 are produced during the Krebs Cycle?
  • What happens to the CO2 that is produced?
  • Why is the conversion of FAD to FADH2 and NAD+ to NADH important?
  • How Many ATP are created in the Krebs Cycle?


Releases 6 original carbons in glucose as 6 CO2;
Stores energy in NADH/FADH2
Occurs in Mitochondrial MATRIX

Each glucose requires TWO turns of cycle
1 GLUCOSE produces: 6 CO2, 2 FADH2, 2 ATP, 8 NADH

ETC-  Electron Transport Chain

  • What does the ETC use to maketo convert ADP to ATP?  Where does it get these from?
  • Where does the ETC occur?
  • How many ATP molecules are created?
  • stage that produces the MOST ATP
    Attached to CRISTAE inner membrane
  • Uses energy from NADH & FADH2 created during glycolysis and Krebs Cycle
    create proton gradient and make ATP
  • ATP—-32
  • 1 glucose yields 36 net ATP during cellular respiration


Find your Caloric intake for one day?  Share results on Monday.

Tutoring Saturdays Starts:

Biology Room: 5320

2/7/15, 2/14/15, 2/21/15, 2/28/15, 3/7/15, 3/14/15, 4/11/15, 4/18/15, 4/25/15
Session time: 8:30 a.m. to 11:30 a.m.

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