Why does an organism need the option of being able to do...

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IA Any question before you start your IA?
How? Why? 2
Consider what fermentation is and why it is done This week investigate assays for determining if fermentation has happened or not Consider how to suit a protocol to a specific question/objective Generate hypotheses about the utility of other sweeteners in the process of fermentation We will then test these hypotheses next week 3 Learning Goals
Yeast This is the organism we will be using in our fermentation investigations Other organisms do fermentation (including animals and people), but those are generally much harder to put in Erlenmeyer flasks
What IS yeast? Write down what you think it is in your desk top How many of you said it was a FUNGUS ?
By Madlen via Shutterstock Royalty-free stock photo ID: 174172934
Bacteria Vs Eukaryotes
Yeast = Model Organism Model organisms are non-human species that are studied to help scientists understand biological mechanisms in humans. Model organisms have short replication cycles, breed in large numbers, inexpensive to maintain, and have genomes that are similar to humans (similar genetic make-up). Examples of model organisms commonly used: Mice, yeast, Zebrafish, Nematode worm, and fruit fly 8
saccharomyces cerevisiae (the type of yeast we are using today) Eukary ote Share 23% Homologous DNA to Humans We both do glycolysis, cellular respiration and fermentation.
Cellular Respiration The main thing you need to know about it is that the end product is ATP
ATP- molecule used to store and transfer energy
Oxygen Present Oxygen NOT Present Metabolic Pathways
BOTH pathways start with Glycolysis Glyco – glucose/sugar Lysis – to loosen , take apart
Oxygen Present Oxygen NOT Present Metabolic Pathways
Oxygen Present Oxygen NOT Present Metabolic Pathways
Why does an organism need the option of being able to do fermentation (anaerobic respiration)?
Glycolysis
Fermentation
How they work together
Why does an organism need the option of being able to do Fermentation?

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