FRIDAY - 10/17 - Fermentation and Cellular Respiration in Yeast

What is the primary role of yeast in the production of biofuel ethanol?

• To produce ethanol through fermentation

• To act as a source of oxygen

• To break down proteins

• To generate carbon monoxide

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Remembering

What is the main sugar that yeast cells prefer for energy production?

• Fructose

• Glucose

• Lactose

• Maltose

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Remembering

During fermentation, yeast cells convert pyruvate into ethanol and ___

(a)  

• carbon dioxide
• oxygen
• glucose
• water

What happens to yeast cells when they are in a dormant state?

• They actively metabolize sugars

• They are alive but inactive

• They produce ethanol

• They undergo glycolysis

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Understanding

What is the role of oxygen in the electron transport chain during cellular respiration?

• It acts as the final electron acceptor

• It breaks down glucose

• It produces ethanol

• It generates carbon dioxide

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Understanding

The process of splitting one molecule of glucose into two pyruvate molecules is called ___

(a)  

• glycolysis
• fermentation
• photosynthesis
• hydrolysis

Why is fermentation important for yeast in low oxygen environments?

• It allows them to produce ethanol

• It enables them to continue ATP production

• It helps them break down proteins

• It increases oxygen levels

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Understanding

The reading states, "Some scientists are experimenting with genetically modified yeast that can ferment other types of plant sugars, such as cellulose from crop waste." This is an example of human trying to create the circular economy. What is circular about what these scientists are attempting to do?

Write two Level 2 questions that relate to this reading. Level 2 questions are analysis and interpretation questions.