Phases of the Cell Cycle

What is the approximate size of a human cell compared to a human?

• One one-millionth

• One one-thousandth

• One one-hundredth

• One tenth

What phase do cells spend most of their time in?

• G1

• Interphase

• Mitosis

• S phase

What is the main activity during the G1 phase of the cell cycle?

• Cell division

• DNA replication

• Protein degradation

• Cell growth and organelle production

What does the S phase stand for?

• Secondary phase

• Segmentation phase

• Synthesis phase

• Season phase

Which type of cells do not usually divide after they are formed?

• Blood cells

• Neurons

• Skin cells

• Muscle cells