Which one of the following has no free aldehyde or ketone group?
Correct answer: B. Sucrose
- A. Fructose
- B. Sucrose
- C. Maltose
- D. Galactose
Explanation
Sucrose is a common disaccharide, meaning it is composed of two monosaccharide sugar units. Specifically, sucrose is made up of one molecule of glucose and one molecule of fructose, joined together by a glycosidic bond. It is often referred to as table sugar and is the most widely used sugar in food and beverage production.
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About Biological Molecules
The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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