Question 1

A cell is observed to have a very low surface area to volume ratio. Which of the following is the most likely consequence for this cell?

Accepted Answer

It will have difficulty efficiently transporting materials in and out, leading to slower metabolism.

Question 2

Which of the following best describes the difference between totipotent and multipotent stem cells?

Accepted Answer

Totipotent cells can become any cell type in the organism, including placenta, while multipotent cells can only become a limited number of cell types.

Question 3

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 4

A scientist observes a cell with condensed chromosomes, a broken-down nuclear envelope, and spindle fibers forming. Which stage of mitosis is this cell in?

Accepted Answer

Prophase

Question 5

If a human somatic cell undergoes mitosis, how many chromosomes will each daughter cell have?

Accepted Answer

$$46$$

Question 6

Which checkpoint in the cell cycle ensures that all chromosomes are properly aligned at the cell's equator before division proceeds?

Accepted Answer

Metaphase checkpoint

Question 7

A mutation in the p53 gene is most likely to result in which of the following outcomes?

Accepted Answer

Uncontrolled cell division due to failure in cell cycle regulation

Question 8

Which of the following best explains why cells must remain small in size?

Accepted Answer

To maintain a high surface area to volume ratio for efficient transport of materials

Question 9

Which of the following equations correctly represents the surface area to volume ratio for a cube-shaped cell with side length $$l$$?

Accepted Answer

$$\frac{6l^2$}{l^3$}$$

Question 10

A patient is diagnosed with cancer caused by a virus that disrupts cell cycle regulation. Which of the following is the most likely mechanism?

Accepted Answer

The virus mutates genes that control the cell cycle, such as tumor suppressor genes.

Question 11

Which of the following events occurs during cytokinesis?

Accepted Answer

The cytoplasm divides, resulting in two separate daughter cells.

Question 12

A researcher is studying a cell that is synthesizing proteins, growing in size, and differentiating. In which phase of the cell cycle is this cell most likely to be?

Accepted Answer

$$G_1$$ phase

Question 13

Which of the following best describes the outcome of mitosis and cytokinesis in somatic cells?

Accepted Answer

Two genetically identical diploid daughter cells are produced.

Question 14

If a cell fails the $$G_1$$ checkpoint, what is the most likely fate of the cell?

Accepted Answer

It will not proceed to DNA synthesis and may enter a non-dividing state.

Question 15

Which of the following is a real-world example of the importance of cell division in adult humans?

Accepted Answer

Healing a skin wound after an injury

Question 16

A cell is observed to have completed DNA replication and is now preparing for mitosis by synthesizing proteins and replicating organelles. Which phase is it in?

Accepted Answer

$$G_2$$ phase

Question 17

Which of the following best explains why cancer cells can divide uncontrollably?

Accepted Answer

They have mutations in genes that regulate the cell cycle, such as p53.

Question 18

Which of the following is NOT a function of the p53 protein?

Accepted Answer

Promoting uncontrolled cell division

Question 19

A cell in metaphase is exposed to a drug that prevents spindle fibers from attaching to chromosomes. What is the most likely result?

Accepted Answer

The cell will be unable to proceed to anaphase, halting division.

Question 20

Which of the following best describes the role of the $$G_2$$ phase in the cell cycle?

Accepted Answer

Preparation for mitosis by synthesizing proteins and replicating organelles

Cell Reproduction and the Cell Cycle: Structure, Function, and Regulation

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