Which is incorrect regarding glycogen?
Correct answer: B. It is a structural polysaccharide
- A. Glycogen is analogous to starch
- B. It is a structural polysaccharide
- C. It is a non-reducing sugar
- D. It gives a red color with iodine solution
Explanation
Glycogen is a storage polysaccharide found primarily in animals, stored in the liver and muscles. It is not a structural polysaccharide, which is a category that includes materials like cellulose in plants. Glycogen's role is similar to that of starch in plants, serving as an energy reserve. Glycogen is non-reducing, meaning it doesn't have a free aldehyde or ketone group to participate in redox reactions. Additionally, glycogen gives a red color when it reacts with iodine solution, which is a classic test for its presence.
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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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