Biology Quiz: Cells and Cell Cycle

Why aren't all organisms made of just one cell?

• Because multicellular organisms have specialized cells for different functions

• Because single-celled organisms cannot survive in diverse environments

Why do cells divide, instead of simply growing larger?

• To reduce the need for DNA replication

• To maintain a suitable cell size and ensure efficient transport of materials

If a cell has damaged DNA, what do you think happens during the G2 checkpoint?

• The cell remains in G2 phase until the DNA is repaired

• The cell skips the G2 phase and directly enters cytokinesis

Why does a skin cell need to divide more frequently than a liver cell?

• Skin cells have a higher surface area-to-volume ratio

• Skin cells have a shorter life span

Make a claim for how the cell cycle relates to the growth and maintenance of organisms.

• The cell cycle allows for growth, repair, and replacement of cells in organisms

• The cell cycle only affects the development of single-celled organisms

Describe the pattern you observe in the surface area-to-volume ratios as the cell gets larger.

• The surface area-to-volume ratio decreases as the cell gets larger

• The surface area-to-volume ratio increases as the cell gets larger

What are advantages or disadvantages of using adult stem cells for research or medical purposes?

• Adult stem cells have a higher risk of rejection in transplant procedures

• Adult stem cells have a higher potential for tumorigenesis

What might be the advantage of exchanging DNA in bacteria through passing it from bacterium to bacterium?

• To increase genetic diversity and adaptability

• To decrease the rate of mutation in bacteria

What does this model tell you about DNA?

• DNA is the genetic material found in both prokaryotic and eukaryotic cells

• DNA is a complex molecule

What is the role of the S phase in the cell cycle?

• The S phase is responsible for the synthesis of proteins

• The S phase is responsible for the synthesis of DNA