What are the most important monosaccarides in biological systems?

glucose and fructose?? is that correct?

Yes, glucose and fructose are indeed important monosaccharides in biological systems, but there are a few more commonly found in living organisms. Monosaccharides are the simplest form of carbohydrates and act as the building blocks for more complex sugars.

In addition to glucose and fructose, other key monosaccharides in biological systems include:

1. Galactose: It is frequently found in the form of a disaccharide called lactose, which is present in milk and dairy products.

2. Ribose and Deoxyribose: These sugars are crucial components of nucleotides, the building blocks of DNA and RNA.

3. Mannose: It plays a role in glycoprotein synthesis and is involved in processes such as cell recognition and immune response.

It's important to note that while glucose is the primary source of energy for most organisms, fructose is commonly found in fruits and some vegetables. These monosaccharides serve various metabolic functions within the body.