The compounds that, on hydrolysis, yield polyhydroxy aldehyde or ketone subunits are:
Correct answer: D. Carbohydrates
- A. Lipids
- B. Proteins
- C. Polynucleotides
- D. Carbohydrates
Explanation
The correct answer is carbohydrate. Carbohydrates are organic compounds that, upon hydrolysis, yield polyhydroxy aldehydes or ketones. This is due to their structure, which includes multiple hydroxyl groups and a carbonyl group, classifying them as either aldehydes or ketones. In contrast, lipids, proteins, and polynucleotides do not consist of or break down into these subunits. Lipids are mainly fatty acids and glycerol, proteins are composed of amino acids, and polynucleotides are made up of nucleotides.
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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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