[Campbell Biology P.171] According to Figure 6.32, which of the following statements about t... | Practice Question

According to Figure 6.32, which of the following statements about the visualization of molecular machinery in a cell is true?

  • A: All structures shown in the figure, including the main plant cell, are enlarged by the same factor.
  • B: Only nucleic acid structures are based on data from the Protein Data Bank.
  • C: Regions whose structure has not yet been determined are shown in gray.
  • D: This figure is primarily intended to illustrate the chemical composition of different organelles within a cell.

Explanation

The introductory text states, 'regions whose structure has not yet been determined are shown in gray.' Options A and B are incorrect as the text clarifies that 'selected molecules and structures shown above and below' are enlarged by the same factor, and 'All protein and nucleic acid structures are based on data from the Protein Data Bank.' Option D misrepresents the figure's primary purpose, which is about scale and molecular machinery.