Question

During which process is ethanol produced

Answer 1

Ethanol is produced by $\boxed{{\text{alcohol fermentation}}}$.

Further explanation :

Lactic Acid fermentation

Under anaerobic conditions, lactate or lactic acid fermentation begins. In this reaction, the enzyme lactate dehydrogenase reduces pyruvate to lactate. NADH is the reducing agent. As pyruvate is reduced and NADH is oxidized.

Alcohol Fermentation:

Under anaerobic conditions, the pyruvate produced by glycolysis undergoes two reactions of the alcohol fermentation.

In the first reaction, the enzyme pyruvate decarboxylase removes carbon dioxide from the pyruvate, producing ethanol. In the second reaction, the enzyme alcohol dehydrogenase catalyzes the reduction of ethanal to form ethanol and oxidation of NADH.

The two products of alcohol fermentation, then, are ethanol and carbon dioxide.

Citric acid cycle:

Citric acid cycle is a set of chemical reactions catalyzed by many enzymes and plays a role in energy production and biosynthesis. It is the last stage of carbohydrates, fats, and amino acids breakdown. In this pathway, two molecules of ATP, six molecules of NADH, and three molecules ${\text{FAD}}{{\text{H}}_{\text{2}}}$ are produced from one molecule of glucose.

Electron transport chain:

Electron transport chains are present in the inner mitochondrial membrane In the mitochondrial membrane, all these molecules accept high energy electrons and transport electrons from one component to the next in the system. In the electron transport chain, NADH and ${\text{FAD}}{{\text{H}}_2}$ donate electrons to electron carriers present in inner mitochondrial membrane and reaches the endpoint of the electron transport chain, where molecular oxygen accepts these electrons to produce water and ATP.

A). The product of lactic acid fermentation is lactate or lactic acid. Hence option A is incorrect.

B). The product of alcohol fermentation is ethanol and carbon dioxide. Hence, option B is correct.

C). The product of the citric acid cycle is ATP and NADH. Hence, option C is incorrect.

D). The product of the electron transport chain is ATP and water. Hence, option D is incorrect.

Therefore, ethanol is produced by alcohol fermentation.

Learn more:

1. Calculate the atoms of hydrogen are present in 2.92g of water molecule brainly.com/question/899408

2. Identify the intermolecular forces present between given molecules. brainly.com/question/10107765

Answer details:

Grade: Senior school

Subject: Chemistry

Chapter: Biomolecules

Keywords: Alcohol fermentation, lactic acid fermentation, citric acid cycle, electron transport chain, ethanol, ATP, NADH, carbohydrates.

Answer 2

The correct answer is B), alcohol fermentation.

Ethanol is produced from biomass via a fermentation process that uses glucose derived from different types of sugars like molasses and sugar cane or starch, corn, or even cellulose. These elements are renewable.  

There is another way to produce ethanol from non-renewable sources like coal and gas. It is known as Synthetic ethanol.

Ethanol is a type of alcohol that kills organisms and can be used in gasoline, antibacterial soaps, and hand sanitizer gels.