Which is an unbranched polymer?
Correct answer: A. Cellulose
- A. Cellulose
- B. Glycogen
- C. Starch
- D. All of the above
Explanation
Cellulose is the correct answer because it is an unbranched polysaccharide consisting of a linear chain of glucose units linked by β-1,4-glycosidic bonds. This linear structure is crucial for its role in providing structural support to plant cells. In contrast, glycogen is highly branched, which makes it effective for energy storage in animals. Starch contains both amylose (which is mostly linear) and amylopectin (which is branched), so it is not entirely unbranched.
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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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