Biology Unit Three Part II - Energy Mrs. Pearson’s First Semester Biology *For those watching by recording, watch for questions on the slides throughout the presentation. Email me the answers to the questions within two days of the lesson being presented in order to receive credit for watching the recording.

Biology Olympics! Note taking – Make your own test questions: Use the bold titles in your reading to help you find the main ideas for test questions:

Turn it into a question How does cellular respiration make ATP? What does cellular respiration use to make ATP? When cellular respiration breaks down sugars, what is made?

Use the bold words to make your own matching question. Put the bold words on flash cards to practice the meanings. ONLY practice the ones you don’t know.

KEY CONCEPT The overall process of cellular respiration converts sugar into ATP using oxygen.

Lesson Objectives Describe the processes and products of cellular respiration.

Pearson’s Perfectly Pleasant Prefixes and Parts Aero – - lysis or - lytic An –

An organism that cannot make its own food uses the process of cellular respiration to make its energy.

Cellular respiration makes ATP by breaking down sugars. Cellular respiration is aerobic, or requires oxygen. Aerobic stages take place in mitochondria. mitochondrion animal cell **Those watching by recording, include in your email why we call mitochondria the “Mighty Mitochondria.”

Glycolysis must take place first. anaerobic process (does not require oxygen) takes place in cytoplasm splits glucose into two three-carbon molecules produces two ATP molecules which start the Kreb Cycle How many carbon dioxide (CO2) molecules can be made from one glucose molecule if you have plenty of oxygen?

Cellular respiration is like a mirror image of photosynthesis. The Krebs cycle transfers energy to an electron transport chain. (Matrix) breaks down pyruvate molecules from glycolysis 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 4 3 and Krebs Cycle Makes one CO2 and a two carbon chain Where does the carbon dioxide go? makes a small amount of ATP which goes to the electron transport chain

energy from glycolysis The electron transport chain produces a large amount of ATP. oxygen enters process ATP produced in large amounts 6H O 2 6CO 6O mitochondrion matrix (area enclosed by inner membrane) inner membrane ATP energy energy from glycolysis 1 4 3 and water released as a waste product Where does the water go? The breakdown of one glucose molecule produces up to 38 molecules of ATP. Electron Transport **Those watching by recording, include in your email how many ATP molecules are made from one glucose molecule.

Say that again?! First glycolysis (breaking glucose into two 3-carbon molecules) takes place in the cytoplasm and produces two ATP that go to the Kreb Cycle. Then the Kreb Cycle uses that ATP to break down the two three-carbon molecules left over from glycolysis to produce a small amount of ATP for the electron transport chain. Carbon dioxide is given off as a waste product. Finally, the electron transport chain uses that ATP along with oxygen to produce large amounts of ATP and water is given off as a waste product.

The equation for the overall process is: C6H12O6 + 6O2  6CO2 + 6H2O The reactants in photosynthesis are the same as the products of cellular respiration. **Those watching by recording, include in your email the equation for cellular respiration and how it compares to the equation for photosynthesis.

Review An organism that cannot make its own food uses the process of cellular respiration to make its energy. Cellular respiration makes ATP by breaking down sugars. Cellular respiration is like a mirror image of photosynthesis. C6H12O6 + 6O2  6CO2 + 6H2O The Krebs cycle transfers energy to an electron transport chain. The electron transport chain produces a large amount of ATP. Fermentation allows glycolysis to continue making ATP when oxygen is unavailable.

Questions?