Cell Cycle · Botany

What is the main role of cyclin-dependent kinases in the cell cycle?

  1. They help form the tough, waxy outer layer of the plant cuticle
  2. They help transport water and dissolved minerals through the xylem
  3. They phosphorylate target proteins to drive cell cycle transitions
  4. They help absorb light energy for use during photosynthesis
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Correct answer: They phosphorylate target proteins to drive cell cycle transitions

Cyclin-dependent kinases are enzymes that add phosphate groups to target proteins. When activated by cyclins, they help move the cell from one cell cycle phase to another.

Difficulty: Medium Question 17 of 20

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