Question 1

During which phase of mitosis do the centromeres split and sister chromatids are pulled to opposite poles of the cell, requiring energy in the form of ATP?

Accepted Answer

Anaphase

Question 2

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

Accepted Answer

Two diploid cells, each identical to the parent cell

Question 3

A mutation causes a cell to bypass the G1 checkpoint. Which of the following is a likely consequence?

Accepted Answer

The cell may divide uncontrollably, increasing cancer risk

Question 4

Which event is unique to Prophase I of meiosis and contributes to genetic diversity?

Accepted Answer

Crossing over between homologous chromosomes

Question 5

In female meiosis, why does one daughter cell receive more cytoplasm than the other during Meiosis I?

Accepted Answer

To ensure the secondary oocyte has enough resources for potential fertilization and development

Question 6

Which of the following best explains why meiosis results in four non-identical daughter cells?

Accepted Answer

Crossing over and independent assortment during Meiosis I, followed by separation of sister chromatids in Meiosis II

Question 7

Which checkpoint in the cell cycle ensures that DNA has been properly replicated before mitosis begins?

Accepted Answer

End of G2

Question 8

A patient is exposed to ionizing radiation, which disrupts cell division. Which treatment is most likely to be used to stop the spread of malignant cells?

Accepted Answer

Chemotherapy to inhibit cell division

Question 9

Which formula correctly represents the chromosome number in diploid human cells?

Accepted Answer

$$2n = 46$$

Question 10

During which phase of mitosis does the nuclear membrane re-form and chromosomes revert to their non-visible chromatin state?

Accepted Answer

Telophase

Question 11

Which environmental factor is most likely to cause abnormal differentiation during fetal development, leading to birth defects?

Accepted Answer

Exposure to thalidomide

Question 12

Which process is responsible for the constant replacement of epithelial cells in the stomach lining?

Accepted Answer

Mitosis

Question 13

If a cell fails to complete cytokinesis after mitosis, what is the most likely outcome?

Accepted Answer

A single cell with two nuclei, each with a diploid chromosome number

Question 14

Which of the following statements about male and female gamete development is correct?

Accepted Answer

Meiosis in females produces one large ovum and smaller polar bodies

Question 15

Which equation represents the number of chromosomes in a human gamete after meiosis?

Accepted Answer

$$n = 23$$

Question 16

A cell exposed to a carcinogen develops a mutation in a gene regulating the cell cycle. Which mechanism is most likely disrupted?

Accepted Answer

Cyclin activation of regulatory proteins

Question 17

Which phase of meiosis is halted in the secondary oocyte until fertilization occurs in females?

Accepted Answer

Metaphase II

Question 18

Which process allows cells to become specialized for different functions, influenced by environmental factors?

Accepted Answer

Differentiation

Question 19

During metaphase of mitosis, what is the primary event occurring?

Accepted Answer

Chromosomes align across the center of the cell

Question 20

Which of the following best describes the genetic composition of daughter cells produced by meiosis?

Accepted Answer

Genetically unique due to crossing over and independent assortment

Mitosis, Meiosis, and Cell Differentiation: Structure, Function, and Regulation

Study Guide - Practice Questions

Study Guide - Flashcards