Question

What is the purpose of checkpoints during the cell cycle? (1 point)
• To repair any damage to the DNA and ensure accurate replication
• To stop the cell cycle when the cell is not needed anymore
• To speed up the process of cell division
• To ensure the cell grows to its maximum size

How are the two daughter cells genetically the same as the parent cell after mitosis? (1 point)
• The parent cell's chromosomes are replicated and divided equally between the daughter cells.
The parent cell undergoes recombination before dividing into two daughter cells
• The parent cell duplicates its DNA before dividing into two daughter cells
• The parent cell divides its genetic material equally between the daughter cells.

Which of the following best defines stem cells? (1 point)
• Stem cells are cells that can divide to produce two identical daughter cells
• Stem cells are undifferentiated cells that can differentiate into specialized cell types
• Stem cells are cells that are found only in the bone marrow
• Stem cells are cells that have already differentiated into specific cell types

What type of cells DO NOT perform mitosis? (1 point)
Skin and hair cells
Rrain and mucale cellc
Blood and organ cells
• Sperm and egg cells

Answer 1

1) To repair any damage to the DNA and ensure accurate replication.
(Checkpoints monitor DNA integrity and proper progression before allowing the cycle to continue.)

2) The parent cell's chromosomes are replicated and divided equally between the daughter cells.
(DNA is duplicated and then segregated so daughters are genetically identical.)

3) Stem cells are undifferentiated cells that can differentiate into specialized cell types.
(They can both self-renew and give rise to specialized cells.)

4) Sperm and egg cells.
(Gametes are produced by meiosis, not mitosis.)