Item RH022003: Protein molecules help other molecules get in and out of cells and speed up chemical reactions in cells.

Which of the following are functions of protein molecules within cells?

  1. Protein molecules help other molecules get in and out of cells, and speed up chemical reactions in cells.
  2. Protein molecules help other molecules get in and out of cells, but do not speed up chemical reactions in cells.
  3. Protein molecules speed up chemical reactions in cells, but do not help other molecules get in and out of cells.
  4. Protein molecules do not help other molecules get in and out of cells, nor do they speed up chemical reactions in cells.

Distribution of Responses

Chart showing distrubtion of responses for Item RH022003

Percent of students responding correctly

Overall32%
Grades 6–832%
Grades 9–1232%
Male31%
Female32%
Primary Language is English33%
Primary Language is not English30%

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