Glucose metabolism is a cycle of biological processes which can break down glucose molecules to obtain ATPs. It involves three pathways: glycolysis, fermentation, and cellular respiration pathways. Glycolysis is an anaerobic reaction that occurs when a cell releases oxygen followed by glucose breakdown. Fermentation occurs after glycolysis and produces ethanol and carbon dioxide as by-products. Fermentation is an “anaerobic process”. In this cycle, NADH is converted into NAD + that is reused for glucose breakdown. Then cellular respiration occurs that produces NADH molecules and generates most ATP molecules.

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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 8, Problem 4MC

Summary Introduction

Introduction:

Glucose metabolism is a cycle of biological processes which can break down glucose molecules to obtain ATPs. It involves three pathways: glycolysis, fermentation, and cellular respiration pathways.

Glycolysis is an anaerobic reaction that occurs when a cell releases oxygen followed by glucose breakdown. Fermentation occurs after glycolysis and produces ethanol and carbon dioxide as by-products. Fermentation is an “anaerobic process”. In this cycle, NADH is converted into NAD⁺that is reused for glucose breakdown. Then cellular respiration occurs that produces NADH molecules and generates most ATP molecules.

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Which of the following statements concerning alcoholic fermentation is NOT true? a. It occurs under aerobic conditions in yeast. b. It converts pyruvate into ethanol and CO2. c. One molecule of NADH is consumed. d. It generates NAD+ for reuse by glycolysis.

Which of these is incorrect regarding fermentation?a. There is a net gain of only two ATP per glucose.b. It occurs in the cytoplasm.c. The process starts with glucose entering glycolysis.d. NADH donates electrons to the electron transport chain.e. It is anaerobic.

Which of the following distinguishes fermentation from aerobic respiration? (Only one choice is correct). A. Fermentation requires an input of oxygen. B. Fermentation occurs under anaerobic conditions. C. Fermentation has a higher ATP yield than aerobic respiration. D. Fermentation breaks down all of the carbon–carbon bonds in a glucose molecule.

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 8, Problem 4MC

Summary Introduction

Introduction:

Glucose metabolism is a cycle of biological processes which can break down glucose molecules to obtain ATPs. It involves three pathways: glycolysis, fermentation, and cellular respiration pathways.

Glycolysis is an anaerobic reaction that occurs when a cell releases oxygen followed by glucose breakdown. Fermentation occurs after glycolysis and produces ethanol and carbon dioxide as by-products. Fermentation is an “anaerobic process”. In this cycle, NADH is converted into NAD⁺that is reused for glucose breakdown. Then cellular respiration occurs that produces NADH molecules and generates most ATP molecules.

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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 8, Problem 4MC

Summary Introduction

Introduction:

Glucose metabolism is a cycle of biological processes which can break down glucose molecules to obtain ATPs. It involves three pathways: glycolysis, fermentation, and cellular respiration pathways.

Glycolysis is an anaerobic reaction that occurs when a cell releases oxygen followed by glucose breakdown. Fermentation occurs after glycolysis and produces ethanol and carbon dioxide as by-products. Fermentation is an “anaerobic process”. In this cycle, NADH is converted into NAD⁺that is reused for glucose breakdown. Then cellular respiration occurs that produces NADH molecules and generates most ATP molecules.

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Check out a sample textbook solution

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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 8, Problem 4MC

Summary Introduction