Q: Which of the following equations correctly represents the relationship between the number of chromosomes ($$n) in a $$somatic cell and a gamete in a diploid organism?

$$n_{somatic} = 2 \times n_{gamete}$$

Question 1

Which of the following best describes the primary function of cell division in multicellular eukaryotes?

Accepted Answer

To produce genetically identical daughter cells for growth, development, and tissue repair

Question 2

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

Accepted Answer

S phase

Question 3

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

Accepted Answer

Metaphase

Question 4

Which of the following statements about sister chromatids is correct?

Accepted Answer

They are identical copies of a chromosome joined at the centromere

Question 5

What is the role of the mitotic spindle during mitosis?

Accepted Answer

It organizes and separates chromosomes during cell division

Question 6

Which checkpoint is considered the most important for determining whether a cell will divide?

Accepted Answer

G1 checkpoint

Question 7

A cell is observed to have a cleavage furrow forming. What process is this cell undergoing?

Accepted Answer

Cytokinesis in an animal cell

Question 8

Which of the following best explains why cancer cells can form tumors?

Accepted Answer

They do not require growth factors to divide and ignore cell cycle controls

Question 9

In the context of cell cycle regulation, what is the function of cyclin-dependent kinases (Cdks)?

Accepted Answer

They phosphorylate target proteins to regulate cell cycle progression

Question 10

A mutation causes a cell to skip the M checkpoint. What is a likely consequence?

Accepted Answer

The cell may divide with an incorrect number of chromosomes

Question 11

Which of the following equations correctly represents the relationship between the number of chromosomes ($$n) in a $$somatic cell and a gamete in a diploid organism?

Accepted Answer

$$n_{somatic} = 2 	imes n_{gamete}$$

Question 12

Which process is most similar to mitosis in terms of chromosome segregation, and what is the key difference?

Accepted Answer

Binary fission; it does not involve a mitotic spindle

Question 13

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

Accepted Answer

The fibroblasts will begin to divide

Question 14

Which of the following best describes the 'Pac-man' mechanism during anaphase?

Accepted Answer

Motor proteins walk chromosomes along microtubules, which depolymerize at the kinetochore ends

Question 15

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

Accepted Answer

It will exit the cell cycle and enter the G0 phase

Question 16

Which of the following is a real-world example of cell division for tissue renewal?

Accepted Answer

Healing of a skin wound

Question 17

Which of the following best explains why chemotherapy drugs often target the cell cycle?

Accepted Answer

They disrupt rapidly dividing cells, such as cancer cells, by interfering with mitosis

Question 18

What is the main difference between cytokinesis in animal cells and plant cells?

Accepted Answer

Animal cells form a cleavage furrow, while plant cells form a cell plate

Question 19

Which of the following is NOT a characteristic of cancer cells?

Accepted Answer

They exhibit anchorage dependence

Question 20

A cell is observed to have two nuclei, each with a complete set of chromosomes, but the cytoplasm has not yet divided. Which stage is this cell most likely in?

Accepted Answer

Telophase

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

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드