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Related Concept Videos

Fermentation01:29

Fermentation

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Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
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Microbial Fermentation01:23

Microbial Fermentation

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Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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Fates of Pyruvate01:20

Fates of Pyruvate

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Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
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Outcomes of Glycolysis01:13

Outcomes of Glycolysis

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Nearly all the energy used by cells comes from the bonds that make up complex organic compounds. These organic compounds are broken down into simpler molecules, such as glucose. As a result, cells extract energy from glucose over many chemical reactions—a process called cellular respiration.
Cellular respiration can occur aerobically (with oxygen) or anaerobically (without oxygen). In the presence of oxygen, cellular respiration starts with glycolysis and continues with pyruvate...
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Energy-requiring Steps of Glycolysis01:20

Energy-requiring Steps of Glycolysis

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Glucose is the source of nearly all energy used by organisms. The first step of converting glucose into usable energy is called glycolysis. Glycolysis occurs in the cytosol of the cell over two phases: an energy-requiring phase and an energy-releasing phase. Over the first three steps, glucose is converted into different forms and attached to two phosphate groups donated by two ATP molecules, resulting in an unstable sugar. In the next two stages, the unstable sugar splits into two sugar...
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Introduction to Cellular Respiration01:22

Introduction to Cellular Respiration

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Organisms harvest energy from food, but this energy cannot be directly used by cells. Cells convert the energy stored in nutrients into a more usable form: adenosine triphosphate (ATP).
ATP stores energy in chemical bonds that can be quickly released when needed. Cells produce energy in the form of ATP through the process of cellular respiration. Although much of the energy from cellular respiration is released as heat, some of it is used to make ATP.
During cellular respiration, several...
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Fermentation Gone Wild: A Biochemistry Laboratory Experiment.

Julie T Millard1, Ronald F Peck1, Tina M Beachy1

  • 1Departments of Chemistry and Biology, Colby College, Waterville, Maine 04901, United States.

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|August 14, 2023
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Summary
This summary is machine-generated.

This experiment teaches biochemistry students to isolate wild yeast strains for brewing potential. It highlights bioprospecting and microbial diversity for novel flavors and aromas.

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Area of Science:

  • Biochemistry
  • Microbiology
  • Biotechnology

Background:

  • Bioprospecting is crucial for discovering new biological resources with commercial or scientific value.
  • Exploring microbial diversity in local environments can yield yeast strains with unique properties.
  • The brewing industry constantly seeks novel yeast strains for distinct flavors and aromas.

Purpose of the Study:

  • To provide upper-level biochemistry students with hands-on experience in yeast isolation and characterization.
  • To illustrate the principles and practices of bioprospecting in a laboratory setting.
  • To assess the potential of wild yeast strains for applications in the brewing industry.

Main Methods:

  • Isolation of wild yeast from diverse environmental sources.
  • Characterization of isolated yeast strains using biochemical techniques.
  • Evaluation of yeast properties relevant to brewing, such as flavor and aroma production.

Main Results:

  • Successful isolation and characterization of wild yeast strains.
  • Demonstration of the feasibility of using environmental samples for yeast discovery.
  • Identification of potential candidates for novel brewing applications.

Conclusions:

  • The experiment effectively integrates biochemical techniques with bioprospecting principles.
  • Students gain practical skills and an appreciation for microbial diversity's role in industry.
  • Wild yeast exploration offers a promising avenue for developing new brewing ingredients.