Cell respiration

Review

It all happens in the cytoplasm and mitochondrion

Anaerobic

• Glycolysis is anaerobic• Fermentation and lactic acid fermentation are

anaerobic• far less ATP ( only 2 per glucose molecule) is

made with out oxygen!

Aerobic Respiration

• Most efficient with oxygen! Up to 38 ATP per glucose.

• Krebs cycle and electron transport are Aerobic.• happens in the mitochondria of eukaryotic

cells.• Electrons have a very strong attraction to

oxygen which is why it is at the end of the electron transport chain!

Glycolysis

• Translated: glyco= glucose• Lysis= split• Splits glucose from 6 carbons into 2 three

carbon molecules called pyruvate. • Happens in the cytoplasm.• Does not require oxygen makes a net gain of 2

ATP and 2 NADH• Requires some energy to get started.

Krebs Cycle

• When oxygen is present pyruvate moves into the mitochondrion. Krebs occurs in the matrix of the mitochondrion.

• A cycle that breaks apart the 2 carbon molecules and forms carbon dioxide and 3 NADH per pyruvate and 1 FADH2 per pyruvate

• 1 ATP directly• It turns 2 times per glucose that goes through

glycolysis.

Krebs cycle

fermentation

• Occurs in the cytoplasm regenerates NAD+• Makes a small amount of ATP (2)• 2 types • Alcohol and lactic acid• Bacteria and yeast use alcohol fermentation to

make ethyl alcohol and CO2.• Muscles, and microorganisms use lactic acid to

make cheese, yogurt and sour cream

Electron transport chain

• Most important part of the cell respiration process!

• Each NADH can make 3 ATP • Each FADH2 can make 2 ATP• Oxygen is the last electron accepter and forms

water at the end when hydrogen bonds with it.• ATP synthase brings hydrogen ions back across

the inner membrane of the mitochondrion to for the ATP

Write the equation for cellular respiration ____________________________________

color the 3 part of respiration different colors.Color the electron transport chain.

Highlight oxygen yellow and water blue!

Explain the 3 main parts of cell respiration1.___________________________________________________________________________________________

2.___________________________________________________________________________________________

3.___________________________________________________________________________________________

Describe what happens in the electron transport chain________________________________________________________________________________________________________________________________________________________________________________________

• Aerobic Cellular Respiration happens in Mitochondria. Three main reactions are involved:

• Glycolosis occurs in cytoplasm of mitochondria (requires 2 ATP to start/ makes 2 ATP)

• Krebs Cycle occurs in matrix of mitochondria (makes 2 ATP)

• Electron Transport Chain occurs in mitochondria; makes majority of ATP (32 ATP)

• Out of 38 ATP Produced - energy of 2 ATP required to start the process.