Question 1

Which phase of the cell cycle is primarily responsible for the accurate duplication of genetic material?

Accepted Answer

Interphase (specifically S phase)

Question 2

During which stage of mitosis do the chromosomes align at the metaphase plate?

Accepted Answer

Metaphase

Question 3

What is the main function of the mitotic spindle during cell division?

Accepted Answer

To control chromosome movement

Question 4

Which of the following best describes cytokinesis in animal cells?

Accepted Answer

Cleavage furrow formation

Question 5

If a cell does not receive a go-ahead signal at the G1 checkpoint, what is its likely fate?

Accepted Answer

It will enter the G0 phase

Question 6

Which of the following is true about cancer cells compared to normal cells?

Accepted Answer

They can divide indefinitely due to transformation

Question 7

What is the role of cyclin-dependent kinases (Cdks) in the cell cycle?

Accepted Answer

They must bind to cyclins to become active and regulate cell cycle progression

Question 8

Which checkpoint is considered the most important for many cells, determining whether the cell will divide?

Accepted Answer

G1 checkpoint

Question 9

In prokaryotes, what is the process called by which the cell divides?

Accepted Answer

Binary fission

Question 10

Which of the following best explains why daughter cells are genetically identical to the parent cell after mitosis?

Accepted Answer

DNA is precisely duplicated during S phase and equally divided during mitosis

Question 11

A researcher observes a cell with condensed chromosomes aligned at the center of the cell, spindle fibers attached to kinetochores, and no nuclear envelope. Which stage is this cell in?

Accepted Answer

Metaphase

Question 12

Which equation best represents the relationship between the number of chromosomes in somatic cells ($$2n) $$and gametes ($$n) in $$humans?

Accepted Answer

$$2n = 2 	imes n$$

Question 13

Which of the following events occurs during anaphase of mitosis?

Accepted Answer

Sister chromatids are separated and move to opposite poles

Question 14

A scientist adds platelet-derived growth factor (PDGF) to a culture of fibroblasts. What is the expected outcome?

Accepted Answer

The fibroblasts will begin to divide

Question 15

Which of the following is a key difference between cytokinesis in plant and animal cells?

Accepted Answer

Animal cells form a cleavage furrow; plant cells form a cell plate

Question 16

Which of the following best describes the role of MPF (Maturation Promoting Factor) in the cell cycle?

Accepted Answer

It triggers the cell’s passage past the G2 checkpoint into the M phase

Question 17

A tumor that invades surrounding tissues and spreads to other parts of the body is called:

Accepted Answer

Malignant

Question 18

Which of the following mechanisms prevents overcrowding of cells in a tissue?

Accepted Answer

Density-dependent inhibition

Question 19

What would most likely happen if the cohesins holding sister chromatids together were not cleaved during anaphase?

Accepted Answer

Sister chromatids would not separate, leading to abnormal daughter cells

Question 20

Which of the following best explains why most animal cells require attachment to a substratum to divide?

Accepted Answer

To ensure proper orientation and signaling for cell division

The Cell Cycle and Cell Division: Structure, Regulation, and Implications

Guida di studio - Domande di pratica

Study guide - Flashcard