Anaerobic respiration is the process by which organisms break down glucose (sugar) to release energy in the absence of oxygen. This process is used to make alcohol in a process called alcoholic fermentation.

Here's how it works:

1. Yeast: Yeast is a type of fungi that is able to perform alcoholic fermentation. They contain enzymes that can break down glucose.

2. Glucose: The yeast is provided with glucose, usually from a source like grapes, barley, or other grains.

3. Glycolysis: The yeast breaks down the glucose through a series of reactions called glycolysis. This process produces pyruvate and a small amount of ATP (energy).

4. Pyruvate to Acetaldehyde: The pyruvate is then converted to acetaldehyde.

5. Acetaldehyde to Ethanol: The acetaldehyde is then converted to ethanol (alcohol). This step is the defining characteristic of alcoholic fermentation.

6. Carbon Dioxide Release: During the process, carbon dioxide is released as a byproduct. This is why alcoholic beverages often bubble.

In summary:

* Yeast breaks down sugar (glucose) in the absence of oxygen.

* This process produces ethanol (alcohol) and carbon dioxide.

Examples of alcoholic beverages produced through alcoholic fermentation:

* Beer

* Wine

* Cider

* Sake

* Mead

It's important to note that while alcoholic fermentation is a natural process, humans have developed methods to control and optimize it for the production of alcoholic beverages. This includes using specific types of yeast, controlling fermentation temperatures, and adding other ingredients to enhance the flavor.