Some friends are trying to make wine in the basement

What metabolic pathway is common to both aerobic and anaerobic processes of sugar breakdown?

Because plants can do photosynthesis they are called?

What is the name of the process in which pyruvic acid is converted to lactic acid?

What must pyruvic acid be converted to before it can enter the citric acid cycle?

____ is used as food and ____ is produced as a waste in the overall process of cellular respiration

The first electron acceptor of cellular respiration is?

Where does electron transport take place?

What is the ultimate source of energy in food?

The electrons removed from glucose in cellular respiration end up in?

What is a product of glycolysis?

Chemical reactions that require oxygen are called ____ while those that do not require oxygen are considered______

What is the second stage of aerobic respiration?

ATP synthase plays a role in

What is oxidized during cellular respiration?

Human muscle cells use lactic acid fermentation to

What is the oldest mechanism to generate ATP?

What waste product do yeast produce under aerobic conditions?

Large amounts of oxygen first appeared in the Earth's atmosphere about ___ years ago

chloroplasts and mitochondira

Aerobic cellular respiration generates about ___ ATP from one glucose

What compound directly provides energy for cellular work?

An aerobic process requires

A glucose molecule is completely broken down upon completion of glycolysis and the citric acid cycle. However, these two processes yield only a few ATPs. Where is the rest of the energy that the cell can obtain from the glucose molecule?

_____ is a chemical process that uses light energy from the sun to build organic molecules

Question:

Some friends are trying to make wine in their basement. They've added yeast to a sweet grape juice mixture and have allowed the yeast to grow. After several days, they find that sugar levels in the grape juice have dropped, but there's no alcohol in the mixture. The most likely explanation is that the mixture needs less oxygen; yeast only produces alcohol in the absence of oxygen. Explain why this is true.

Yeast belongs to the Kingdom Fungi. It is a unicellular, non-pathogenic eukaryote. It can be grown on any simple defined media. Doubling time is approximately 90-120 minutes.

Saccharomyces cerevisiae is the most commercially important species for the production of bread, wine and beer.

Answer and Explanation: 1

Yeast can grow in the presence or absence of oxygen.

In the presence of oxygen (aerobic respiration), it will breakdown carbohydrates (glucose) into carbon dioxide and water.

In the absence of oxygen (anaerobic respiration), it will breakdown carbohydrates (glucose) into carbon dioxide and alcohol.

So for brewing, anaerobic respiration is very important because the production of alcohol occurs only in the absence of oxygen.

Learn more about this topic:

Alcohol Fermentation: Definition, Equation & Process

from

Chapter 9 / Lesson 9

Learn what alcoholic fermentation is, the process of alcoholic fermentation, and its use in nature and industry.

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The Elements of Life

In biology, the elements of life are the essential building blocks that make up living things. They are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. The first four of these are the most important, as they are used to construct the molecules that are necessary to make up living cells. These elements form the basic building blocks of the major macromolecules of life, including carbohydrates, lipids, nucleic acids and proteins. Carbon is an important element for all living organisms, as it is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. Even the cell membranes are made of proteins. Carbon is also used to construct the energy-rich molecules adenosine triphosphate (ATP) and guanosine triphosphate (GTP). Hydrogen is used to construct the molecules water and organic compounds with carbon. Hydrogen is also used to construct ATP and GTP. Nitrogen is used to construct the basic building blocks of life, such as amino acids, nucleic acids, and proteins. It is also used to construct ATP and GTP. Oxygen is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids. It is also used to construct ATP and GTP. Phosphorus is used to construct the basic building blocks of life, such as carbohydrates, lipids, and nucleic acids.