Question

The image shows the flow diagram for the breakdown of glucose in yeast.Under which condition these types of products are obtained?* Glucose Pyruvate + Energy In yeast Ethanol + CO2 + Energy (a) in the presence of oxygen O (b) in the absence of oxygen O (c) the presence of carbon dioxide (d) in the absence of carbon dioxide​

Answer 1

Answer:

b

Explanation:

carbon dioxide presence in this.

image 4 of the following diagram for big down glucose and little price of the energy of oxygen . answer is in absence of carbon dioxide

Answer 2

This process occurs in the absence of oxygen.

• The process explained by given equation is Alcoholic Fermentation. It is a path taken by pyruvate after glycolysis if there is no oxygen available, i.e, it is a type of anaerobic respiratory pathway.

• In this type of respiration, pyruvate is converted to ethanol by removal of carbon dioxide - reductive decarboxylation. In this pathway 2 units of ATP are produced.
• It is carried out by yeast which can respire anaerobically. They poison themselves after 13% alcohol (ethanol) production.
• In the presence of oxygen, pyruvate would have entered mitochondria and acted as substrate for Kreb's Cycle.

Hence option (B) in the absence of oxygen is the correct answer.