I. Cellular Energy a. Cellular respiration-process of

breaking down glucose molecules to produce energy (ATP) b. All cells go through cellular

respiration----plant and animal cells

i. GLYCOLYSIS1. 1st step of cellular respiration

2. Cells break down glucose to make 2 ATP and

pyruvic acid3. Takes place in the cytoplasm

Aerobic versus Anaerobic Respiration Is Oxygen Present?

Yes NoAEROBIC RESPIRATION ANAEROBIC RESPIRATION

Must have O2 No O2 is needed

Takes place in the takes place in the mitochondria cytoplasm

Produces 36 ATP produces 2 ATP

c. Aerobic Respirationi. Occurs only when oxygen is present

ii. A series of reactions that change pyruvic acid into ATP

1. the Krebs cycle or the citric acid cycle takes place in the mitochondria i. It produces 2 ATP

2. The electron transport chain also takes place in the mitochondria and it produces 34 ATP

iii. With glycolysis, aerobic respiration produces 36 NET ATP molecules from 1 glucose---2 ATP are used to drive the process

Section 9-2

Electron TransportHydrogen Ion Movement

ATP Production

ATP syntheses

Channel

Inner Membrane

Matrix

Intermembrane Space

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Mitochondrion

iv. ATP is used for cell processes, growth, repair, movement, homeostasis etc…

GlucoseGlycolysis

Cytoplasm

Pyruvic acid

Electrons carried in NADH

Krebs Cycle

Electrons carried in

NADH and FADH2 Electron

Transport Chain

Mitochondrion

Mitochondrion

Section 9-1

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Aerobic Respiration Summary (including glycolysis)

Glucose Net 36 ATPC6H12O6 (plus CO2 and

H2O)

Chemical reactionsRequiring ADP, ATP, Phosphate and Oxygen

Section 9-2

Glucose(C6H1206)

+Oxygen

(02)

GlycolysisKrebsCycle

ElectronTransport

Chain

Carbon Dioxide

(CO2)+

Water(H2O)

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Cellular Respiration

d. Anaerobic Respirationi. Occurs when no oxygen is present

ii. Not very efficient---only produces 2 ATP molecules from one glucose

iii. There are different types of anaerobic respiration

1. Lactic Acid Fermentation -animal and some bacteria use this process

a. Produces lactic acid (causes muscle soreness) and 2 ATP

2. Alcoholic Fermentation -plant cells and some microorganism like yeast

a. Produces ethyl alcohol and CO2 and ATP

Alcoholic drinks are produced with fermentation, and bread is forced to rise from the carbon dioxide produced by yeast fermenting the bread.

The alcohol in bread is evaporated during the cooking process.

Glucose

Glycolysis Krebs cycle

Electrontransport

Alcohol or lactic acid

Section 9-1

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Fermentation (without oxygen)

Photosynthesis and respiration are almost exactly opposite reactions.

Photosynthesis:6CO2 + 6H2O + sun light C6H12O6 + 6O2

Respiration:C6H12O6 + 6O2 6CO2 + 6H2O + ATP

Cellular Respiration

Photosynthesis

Takes place in--

Occurs when--

What goes in?

What comes out?

Energy source?

Result?

Cellular Respiration

Photosynthesis

Takes place in-- All cellsCells withChloroplast

Occurs when-- All of the timeIn the presence of light

What goes in?Carbohydrates and oxygen

CO2 and H2O

What comes out? CO2 and H2OCarbohydrates and oxygen

Energy source? Chemical bonds Light

Result?Energy is stored as ATP

Energy is stored as carbohydrates

Copy and CompleteWhat is the process that starts cellular

respiration?Name three parts of aerobic respiration.How many ATP molecules are produced from

one glucose molecule by glycolysis?Most of aerobic respiration occurs in the ____.Anaerobic respiration occurs in the___.During glycolysis, glucose is broken down into

pyruvic acid, and two molecules of ATP are formed. What will happen next in a muscle cell if NO oxygen is present?

When yeast is deprived of oxygen, it will convert glucose into—

Which process does NOT produce CO2?How many ATP molecules are produced

form one glucose molecule during the entire process of aerobic respiration?

How many net ATP molecules are produced from one glucose molecule if a cell undergoes anaerobic respiration?