Mitosis and Meiosis Exam

What is the order of the stages of a cell’s life?

• M, G2, S, G1

• Prophase, metaphase, anaphase, synthesis

• G1, S, G2, M

• Interphase, Prophase, Cytokinesis, Gap 1

During which phase of the cell cycle does the size of the cell increase?

• G1

• S

• Prophase

• Mitosis

During which phase does the number of cells increase?

• G1

• S

• G2

• M

For cancer cells, what happens to the time that is necessary for the cell cycle?

• Cancer cells grow slower than normal cells, so they spend more time in the cell cycle

• Cancer cells grow faster, so they spend less time in the cell cycle

• Cancer cells do not go through the cell cycle

• Cancer cells do not have to grow, so they will not go through mitosis

Imagine 100 cells were chosen randomly from a tissue sample and examined under a microscope. In which phase of the cell cycle would you expect to find the largest number of cells? Explain.

• Most cells would be in the S phase because it is the most important phase

• Most cells would be in G1 because that is where they spend the most time

• Most cells would be in the M phase because they spend the least amount of time there

• Most cells would be in G2 because cells spend one hour in G2

What happens to a cell during cytokinesis?

• The nucleus of the cell divides in half

• The cytoplasm of the cell divides in half to make 2 new cells

• The spindle fibers form

• The chromosomes pull apart

Which of the following is a difference between G1 and G2 in the cell cycle?

• During G1, the cell grows, G2 the cell replicates its DNA

• During G1, the cell divides its nucleus, G2 the cell grows

• During G1, the cell replicates its DNA, G2 the cell prepares to divide

• During G1, the chromosomes have not been replicated, during G2, the chromosomes have been replicated.

If a starfish sustains damage to a limb, it often grows a new one. If a human adult sustains damage to their spinal cord, mobility is often impaired. Which type of cell is less likely to go through the cell cycle after being damaged: a starfish limb, or a human spinal cord? Why?

• A human spinal cord because these cells go into G0 and stop dividing

• A starfish limb because its cells go into G0 and stop dividing

• A human spinal cord because its cells will keep going through the cell cycle

• A starfish limb because its cells will keep going through the cell cycle

Why will brain cells not come back if they get damaged and die off?

• Because they are similar to cancer cells

• Because they are haploid and only have one set of chromosomes

• Because they enter into G0 and do not continue in the cell cycle

• Because they are body cells, and body cells do not go through the cell cycle

Ultraviolet light may cause DNA damage, which is known as a mutation. How might such damage affect events taking place during the synthesis phase?

• DNA is not affected by ultraviolet radiation

• The mutated DNA would be copied in the S phase and passed on to the new cells

• The mutated DNA would help the cell divide

• The mutated DNA would help the cell grow in the S phase