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Which statement does NOT describe external regulatory proteins?
1 They respond to events occurring inside a cell.
2. Growth factors are one group of external regulatory proteins.
3. They can speed up or slow down the cell cycle.
4. Some can cause cells to slow down or stop their cell cycles.

Respuesta :

Answer: 1) They respond to events occurring inside a cell.

Explanation:

The rest DO describe external regulatory proteins except the first option.

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1. They respond to events occurring inside a cell.

External Regulators Proteins:

  1. External Regulators Proteins that respond to events outside the cell are called external regulators.
  2. External regulators direct cells to speed up or slow down the cell cycle.
  3. Growth factors are among the most important external regulators.
  4. They stimulate the growth and division of cells.
  5. The three types of external regulators proteins are Cyclins, cyclin-dependent kinases (Cdks), and the APC/C.

Therefore, the statement that NOT describe external regulatory proteins is Statement 1.

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