2.7 Cells use ATP molecules to get energy. Cells need energy for many functions. The source of energy is ATP (adenosine triphosphate). ATP undergoes a.

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  • 2.7 Cells use ATP molecules to get energy.Cells need energy for many functions. The source of energy is ATP (adenosine triphosphate). ATP undergoes a chemical reaction that releases energy.ATP + H2O ADP + P + energyTO PREVIOUS SLIDEUNIT 1Concept 2.7Chapter 2: The Cell Up Close: Processes That Sustain Life

  • TO PREVIOUS SLIDEUNIT 119. What does ATP stand for, and what type of molecule is it?

    20. How is ATP used in cells?

    21. Describe the reaction in which ATP releases energy.Concept 2.7Chapter 2: The Cell Up Close: Processes That Sustain LifePause and Check

  • 2.8 Cellular respiration makes ATP.Aerobic cellular respiration is one way plant and animal cells make ATP. The overall process is

    TO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain LifeThe numerous reactions involved occur in two stages:1.Glycolysis, which takes place in the cytosol.2.Oxidative respiration, which takes place in mitochondria.

  • Glycolysisoccurs in the cytosolinvolves many reactions that split each glucose molecule into two 3-carbon molecules (pyruvate) form 2 molecules of ATPTO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain Life

  • Oxidative RespirationPyruvate from glycolysis enters the mitochondrion.A series of chemical reactions involving oxygen break pyruvate down to carbon dioxide and water.As many as 34 ATP molecules can be produced for each glucose molecule. TO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain Life

  • Overall process of aerobic cellular respirationTO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain Life

  • Food Molecules and the Production of ATPTO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain Life

  • Cellular Respiration and PhotosynthesisSome organisms, such as plants, produce their own food by photosynthesis.Photosynthesis takes place in chloroplasts and involves using energy from the Sun to convert carbon dioxide and water into glucose and oxygen.TO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain LifePlants also use oxygen to make ATP by aerobic cellular respiration, but they produce more oxygen than they use.

  • FermentationSome organisms can survive where there is little or no oxygen. Fermentation is the production of ATP in the absence of oxygen. Glycolysis produces two pyruvates from each glucose molecule. Then reactions such as alcoholic fermentation or lactic acid fermentation produce ATP.TO PREVIOUS SLIDEUNIT 1Concept 2.8Chapter 2: The Cell Up Close: Processes That Sustain LifeThis is how alcohol is made yeast ferment the wheat, grapes etc.This what your muscles do if you exercise too strenuously.

    *Answers:

    19. ATP stands for adenosine triphosphate. It is a nucleotide.20. ATP contains the form of energy that can be used by the cell. 21. ATP splits into ADP and a free phosphate group and, in so doing, releases energy.********

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