Other
Biol 1406 Yeast Fermentation Lab Report
- Course
- BIOL 1406
- Institution
- Lone Star College
This is a comprehensive and detailed lab report on Yeast Fermentation for Biol 1406. *Essential Study Material!!
[Show more]
Content preview
Basic Knowledge Questions1. What is yeast?
Fungi,
Eukaryotic, single-celled micro-organism
Leavening agent
2. What is the scientific name of yeast?
Saccharomyces cerevisiae
3. What is the process of fermentation?
Primary, secondary, condition,
Metabolic process
Anaerobic respiration
Extraction of energy from carbohydrates in the absence of oxygen to produce carbon dioxide
4. What types of molecules does yeast need to conduct fermentation?
Basic sugar substrate, oxygen for growth, carbon dioxide
5. What carbohydrate source or mixture of sources affect fermentation the most?
Glucose (the greatest rate), carbon dioxide product is the greatest
6. What types of substrates and enzymes can yeast be used in the process of fermentation?
Maltase and invertase enzymes,
Glucose substrate
7. How do these enzymes function?
Yeast produces these enzymes to make simple sugars for cell growth and fermentation
8. How does ethanol concentration affect the yeast?
High ethanol increases cell death chances, decrease cell volume and specific growth rate inhibits
cell division
, Literature Review Questions
1. Fermentation using yeast article:
Yeast ferments carbon sources to produce ethanol and carbon dioxide. The yeast cell cycle haplo-
and diplophases.
horizontal gene transfer, changes in the gene copies number, chromosomal rearrangements,
hybrid genome breakdown, intraspecific hybridization.
Davydenko, S., Meledina, T., Mittenberg, A., Shabelnikov, S., Vonsky, M., & Morozov, A.
(2020). Proteomics Answers Which Yeast Genes Are Specific for Baking, Brewing, and Ethanol
Production. Bioengineering (Basel), 7(4), 1–15.
https://doi-org.lscsproxy.lonestar.edu/10.3390/bioengineering7040147
What impacts yeast fermentation article:
Temperature, pH value that is lower than pK, acetic acid (4.75 at 25 degrees Celsius)
Cellulose and hemicellulose chemicals, can increase acetic acid
Iron ions can catalyze the reaction and formation- oxidative damage
High ethanol concentration which can cause the cell to mutate
Environmental stress levels that the yeast endures needs to be adaptable or perfect conditions for
the conduction of the experiment
Vamvakas, S.-S., & Kapolos, J. (2020). Factors affecting yeast ethanol tolerance and
fermentation efficiency. World Journal of Microbiology & Biotechnology, 36(8), N.PAG.
https://doi-org.lscsproxy.lonestar.edu/10.1007/s11274-020-02881-8
2. Different types of yeast used for baking and brewing article:
Saccharomyces cerevisiae (top) - wine brewing yeast, improves ethanol tolerance
Vamvakas, S.-S., & Kapolos, J. (2020). Factors affecting yeast ethanol tolerance and
fermentation efficiency. World Journal of Microbiology & Biotechnology, 36(8), N.PAG.
https://doi-org.lscsproxy.lonestar.edu/10.1007/s11274-020-02881-8
Top-fermenting Saccharomyces cerevisiae and bottom-fermenting Saccharomyces pastorianus
including their strains and hybrids. Differences are growth and fermentation temperature,
forming of fermentation by-products or cell complexes.
Brewing yeasts are usually the bottom-fermenting Saccharomyces used for ‘wheat beers’
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.89. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78252 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now