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Objective To determine if the type of sugar used in yeast fermentation affects fermentation rate.    Background Yeast (Saccharomyces cerevisiae) is a single-celled microorganism used in the production of bread and alcoholic beverages. It is a facultative anaerobe that ferments sugars to make carbon dioxide and ethanol. Facultative means that it can grow whether oxygen […]

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Objectives By the end of this lesson you should be able to: Define the term virus Identify main factors contributing to the spread of viral diseases  Identify type of viruses by shape Define the term bacteriophage Differentiate between the lytic and lysogenic cycles of viruses Explain in detail, the molecular mechanisms involving lambda virus’s “decision” […]

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Objectives By the end of this lesson you should be able to: Explain the effect of chromatin and DNA chemical modification on gene expression Explain your understanding of epigenetics Describe methods utilized by the eukaryotic cell in the regulation of transcription initiation Describe methods utilized by the eukaryotic cell in the regulation of gene expression […]

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Objectives By the end of this lesson you should be able to: Describe the operation of the trp operon Describe the operation of the lac operon Differentiate between positive and negative gene regulation Give an example of positive gene regulation What’s An Operon? Metabolic controls generally take place at two levels. The organism can either […]

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