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Understanding Yeast: A Single-Celled Eukaryotic Organism in Biology and Brewing, Study notes of Biology

Explore the world of yeast, a microscopic eukaryotic organism essential in biology and brewing. Learn about its cellular structure, respiration processes, and applications in scientific research and industries. Compare yeast to prokaryotic cells and discover the differences between anaerobic and aerobic respiration.

What you will learn

  • How does yeast perform cellular respiration?
  • What is the difference between prokaryotic and eukaryotic cells?
  • What is the role of yeast in scientific research?
  • Which yeast species is commonly used in baking and brewing?
  • What are the differences between anaerobic and aerobic respiration?

Typology: Study notes

2021/2022

Uploaded on 09/12/2022

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Download Understanding Yeast: A Single-Celled Eukaryotic Organism in Biology and Brewing and more Study notes Biology in PDF only on Docsity!

Yeast are single-celled

microorganisms,

meaning individual

yeast are made up of

only one cell.

To compare, all animals

and most plants are

multicellular organisms.

Yeast are eukaryotic cells,

meaning they have a

defined nucleus and

membrane-bound

organelles.

They are different from

bacterial cells, which are

prokaryotic and therefore

do not have a defined

nucleus or organelles.

Yeast are classified as part of the Fungi Kingdom , separate from the Plant and Animal Kingdoms.

There are hundreds of yeast species, but usually when people talk about yeast, they are talking about Saccharomyces cerevisiae , the species commonly used in baking.

Aerobic respiration is a metabolic process that

occurs in the presence of oxygen and turns

nutrients into energy. This is a process that both

single-celled and multicellular organisms perform.

The release of carbon dioxide by the yeast is what causes the tiny bubbles in bread dough, making it rise and giving it an airy texture.

In the balloon experiment, the yeast are

performing anaerobic respiration , or

fermentation , because their environment is

lacking oxygen.

This is the same process that is used to make beer.

Yeast are invaluable to the scientific community because they are used as model organisms for eukaryotes.

In the lab, they have been used to generate biopharmaceuticals , such as the hepatitis vaccine and insulin to treat diabetes.

• http://www.aboutthemcat.org/biology/prokar

yotic-vs-eukaryotic-cells.php

• http://blog.beeriety.com/2009/07/06/how-

beer-is-made/

• https://www.ncbi.nlm.nih.gov/pmc/articles/P

MC3728191/

• http://www.trackingvaccinations.com/