which of the following is not an organic compound:

cellulose
sucrose
water
testosterone

To determine which of the following substances is not an organic compound, we need to understand what organic compounds are.

Organic compounds are substances that contain carbon atoms bonded together with other elements such as hydrogen, oxygen, nitrogen, sulfur, and phosphorus. These compounds are generally associated with living organisms and are responsible for various biological processes.

Let's analyze each substance:

1. Cellulose: Cellulose is a complex carbohydrate polymer made up of glucose units. It is important for the structure of plant cell walls. Since it contains carbon atoms bonded with other elements, it is considered an organic compound.

2. Sucrose: Sucrose is a common sugar known as table sugar. It is composed of glucose and fructose units linked together. Since it contains carbon atoms and other elements, it is also an organic compound.

3. Water: Water is a simple compound made up of two hydrogen atoms bonded with one oxygen atom. Although it is essential for life and is found in nearly all organic compounds, water itself does not contain carbon atoms. Therefore, water is not considered an organic compound.

4. Testosterone: Testosterone is a hormone primarily found in males, responsible for the development of male reproductive tissues and secondary sexual characteristics. It contains carbon atoms bonded to other elements, so it is an organic compound.

In conclusion, the substance that is not an organic compound is water.