Question

question 5 (1 point)
cell cycle regulators are important because they:
\ta help prevent excessive growth of cells (tumors)
\tb help tell cells when to differentiate
\tc all of these choices are correct
\td help start or stop cell division

question 6 (1 point)
the process of cells becoming specialized to perform a certain function is called cell differentiation
\ttrue
\tfalse

Explanation:

Question 5

• Option a: Cell cycle regulators control cell growth; abnormal regulation can lead to tumors, so they help prevent excessive growth.
• Option b: Cell cycle regulators are involved in guiding cells to differentiate at appropriate times.
• Option d: A key role of cell cycle regulators is to initiate or halt cell division at the right stages.

Since a, b, and d are all correct functions of cell cycle regulators, option c is the right choice.

Cell differentiation is defined as the process where cells develop into specialized cell types with distinct functions (e.g., muscle cells, nerve cells). The statement matches this definition.

Answer:

c. all of these choices are correct

Question 6