Download GLYCOLYSIS

Cellular Respiration
Part 1:
Glycolysis & Fermentation
Objectives
Identify the two major steps of cellular
respiration
 Describe the major events in glycolysis
 Compare lactic acid fermentation with
alcoholic fermentation
 Calculate the efficiency of glycolysis

Cellular Respiration
Is the process in which cells make ATP by
breaking down glucose
 ATP is needed for cells to do __________.
 All living things do cellular respiration
 Many of the reactions in cellular
respiration are redox reactions
 Redox is short for _______________,
in which one reactant loses electrons and
the other gains electrons

TURNING GLUCOSE INTO
ATP FOR CELL WORK
Why are these reactants and
products familiar?
REVIEW
1. What fuel
do we use
to make
energy?
REVIEW
2. WHERE DO WE GET THE FUEL?
3. WHERE DO PLANTS GET
THE FUEL?
Locations of Cellular Respiration
CYTOPLASM &
MITOCHONDRION
Overview of Cellular Respiration
The products of photosynthesis become
the reactants of respiration
 Cellular respiration is divided into two
stages:
 Glycolysis (______________)
 Aerobic Respiration (__________)

Steps of Cellular Respiration
Glycolysis
2. Krebs Cycle
3. Electron Transport Chain
1.
GLYCOLYSIS
 Is
the process of glucose
being split into 2 molecules of
pyruvic acid
 It happens in the cytoplasm
 Is catalyzed by special enzymes
 It is anaerobic
 What does anaerobic mean?
GLYCOLYSIS
1. Glucose is converted into a new 6-C
compound by using 2 ATP’s
2. The 6-C compound is then split into two 3
carbon molecules of G3P
3. The 2 G3P molecules are then oxidized
into 2 new 3-C molecules by reducing 2
NAD+ into 2 NADH & 2H+
4. Finally, 4 ADP molecules are added to the
3-C molecules, forming 2 molecules of
pyruvic acid, 4 ATP’s, & 2 H2O
GLYCOLYSIS
Glycolysis Energy Account
Used
Made
Net total:
What Happens when Oxygen is
Not Present after Glycolysis?
Fermentation
Alcoholic
Fermentation
Glycolysis
Ethanol
Glucose
2 Pyruvic
acid
E
Lactic Acid
Fermentation
Lactic Acid
Review
9. What are the two types of fermentation?
10. Which type of fermentation do humans
sometimes do?
11. What does lactic acid do to humans?