Cell Division and Senescence Quiz

Which type of cells in the body are capable of dividing and regenerating tissues?

• Post-mitotic cells

• Mitotic cells

• Neurons

• Heart muscle cells

How do post-mitotic cells differ from mitotic cells?

• They are incapable of proliferation

• They can divide and regenerate tissues

• They have a high division capacity

• They express telomerase

What is the primary function of telomeres during DNA replication?

• To code for proteins

• To initiate cell division

• To protect DNA from damage

• To increase cell size

What happens to a cell when its telomeres become too short?

• It starts dividing faster

• It becomes senescent

• It undergoes apoptosis

• It becomes a cancer cell

What is the Hayflick limit?

• The maximum size a cell can reach

• The number of times a cell can divide before senescence

• The time it takes for a cell to divide

• The number of cells in a tissue

What is one potential downside of having too many senescent cells in tissues?

• Reduced ability to repair tissues

• Improved tissue function

• Faster cell division

• Increased risk of infection

How does telomerase affect stem cells?

• It prevents them from dividing

• It maintains their division capacity

• It causes them to become senescent

• It shortens their telomeres

What can cause a somatic cell to start expressing telomerase?

• Exposure to sunlight

• A mutation in its DNA

• Lack of nutrients

• Excessive exercise

What is the role of telomerase in cancer development?

• It repairs damaged DNA in cancer cells

• It allows cancer cells to divide indefinitely

• It causes cancer cells to die

• It prevents cancer cells from dividing

What is the main reason stem cells can divide indefinitely?

• They have more DNA

• They are larger in size

• They express telomerase

• They have longer telomeres