[Campbell Biology P.119] Cellulose molecules, despite being composed of glucose monomers lik... | Practice Question

Cellulose molecules, despite being composed of glucose monomers like starch and glycogen, function primarily as structural components in plants. Which of the following features contributes most significantly to this structural role, according to the provided text and diagram?

  • A: Its extensive branching pattern, which allows for compact storage.
  • B: The formation of helical structures by its polymer chains.
  • C: The different type of glucose linkage and hydrogen bonds between parallel unbranched cellulose molecules, leading to strong microfibrils.
  • D: Its storage in plastids within plant cells.

Explanation

The text explains that cellulose has a 'different kind of glucose linkage' and is 'always unbranched'. Figure 5.6 c further illustrates 'Hydrogen bonds between parallel cellulose molecules hold them together,' forming strong 'Microfibril bundle of about 80 cellulose molecules .' These features collectively contribute to its robust structural role.