The Pasteur effect on the aerobic culture of yeast on glucose, where the rate of glucose consumption declined dramatically. Introduction: Under anaerobic conditions, yeast uses its nutrition as an energy producer. In this condition, yeast cells cannot undergo oxidative phosphorylation; hence, they have to produce their entire ATP requirement through glycolysis, which is less efficient. In aerobic condition, yeast cells undergo oxidative phosphorylation that accompanies the oxidation of glucose in the presence of oxygen to produce ATP through the respiratory chain system. In this condition, cellular respiration is carried out; hence, this process is efficient for growth.

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Answer 1

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 14, Problem 4P

Summary Introduction

To explain: The Pasteur effect on the aerobic culture of yeast on glucose, where the rate of glucose consumption declined dramatically.

Introduction: Under anaerobic conditions, yeast uses its nutrition as an energy producer. In this condition, yeast cells cannot undergo oxidative phosphorylation; hence, they have to produce their entire ATP requirement through glycolysis, which is less efficient. In aerobic condition, yeast cells undergo oxidative phosphorylation that accompanies the oxidation of glucose in the presence of oxygen to produce ATP through the respiratory chain system. In this condition, cellular respiration is carried out; hence, this process is efficient for growth.

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One of the ways for a cell to generate ATP is through the oxidative phosphorylation. In oxidative phosphorylation 3 ATP are produced from every one NADH molecule. In respiration, every glucose molecule produces 10 NADH molecules. If a cell is growing on 5 glucose molecules, how much ATP can be produced using oxidative phosphorylation/aerobic respiration?

If a cell is growing on 5 glucose molecules, how much ATP can be produced using oxidative phosphorylation/aerobic respiration?

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Answer 2

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 14, Problem 4P

Summary Introduction

To explain: The Pasteur effect on the aerobic culture of yeast on glucose, where the rate of glucose consumption declined dramatically.

Introduction: Under anaerobic conditions, yeast uses its nutrition as an energy producer. In this condition, yeast cells cannot undergo oxidative phosphorylation; hence, they have to produce their entire ATP requirement through glycolysis, which is less efficient. In aerobic condition, yeast cells undergo oxidative phosphorylation that accompanies the oxidation of glucose in the presence of oxygen to produce ATP through the respiratory chain system. In this condition, cellular respiration is carried out; hence, this process is efficient for growth.

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Answer 3

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 14, Problem 4P

Summary Introduction

To explain: The Pasteur effect on the aerobic culture of yeast on glucose, where the rate of glucose consumption declined dramatically.

Introduction: Under anaerobic conditions, yeast uses its nutrition as an energy producer. In this condition, yeast cells cannot undergo oxidative phosphorylation; hence, they have to produce their entire ATP requirement through glycolysis, which is less efficient. In aerobic condition, yeast cells undergo oxidative phosphorylation that accompanies the oxidation of glucose in the presence of oxygen to produce ATP through the respiratory chain system. In this condition, cellular respiration is carried out; hence, this process is efficient for growth.

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Answer 4

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Definition Definition Set of metabolic processes and reactions that produce energy from organic substances such as glucose. Cellular respiration takes place in the organism’s cells, where the chemical energy from nutrients or molecules of oxygen is converted into adenosine triphosphate (ATP). Cellular respiration that occurs in the presence of oxygen is called aerobic respiration; in the absence of oxygen, it is called anaerobic respiration.

Chapter 14, Problem 4P

Summary Introduction