Question 1

Which of the following best describes the difference between chromosomes in prokaryotes and eukaryotes?

Accepted Answer

Prokaryotes have a single circular chromosome, while eukaryotes have multiple linear chromosomes.

Question 2

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

Accepted Answer

S phase

Question 3

A cell with 46 chromosomes undergoes mitosis. How many chromosomes and DNA molecules will each daughter cell have immediately after mitosis?

Accepted Answer

46 chromosomes and 46 DNA molecules

Question 4

Which checkpoint in the cell cycle ensures that DNA has been properly duplicated before the cell enters mitosis?

Accepted Answer

$$G_2$$ checkpoint

Question 5

What is the main function of somatic cells in multicellular organisms?

Accepted Answer

To carry out body functions such as forming skin, liver, and brain

Question 6

Which of the following statements about chromatin and chromosomes is correct?

Accepted Answer

Chromatin is a complex of DNA and proteins, while chromosomes are condensed chromatin visible during cell division.

Question 7

During which stage of mitosis do chromosomes line up at the equator of the cell?

Accepted Answer

Metaphase

Question 8

A scientist observes a cell with condensed chromosomes aligned at the center and spindle fibers attached to centromeres. Which stage of mitosis is this cell in?

Accepted Answer

Metaphase

Question 9

Which of the following best describes cytokinesis in animal cells?

Accepted Answer

Formation of a contractile ring that pinches the cell in two

Question 10

What is the role of the M checkpoint in the cell cycle?

Accepted Answer

It ensures that all chromosomes are properly attached to the spindle before anaphase.

Question 11

Which of the following is a characteristic of cancer cells but not normal cells?

Accepted Answer

They do not exhibit density-dependent inhibition.

Question 12

If a cell fails the G1 checkpoint, what is the most likely outcome?

Accepted Answer

The cell will enter a non-dividing state known as $$G_0.$$

Question 13

Which process describes the division of the cytoplasm to form two daughter cells?

Accepted Answer

Cytokinesis

Question 14

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

Accepted Answer

Malignant

Question 15

Which of the following is true regarding DNA molecules in non-dividing cells?

Accepted Answer

Each chromosome consists of one DNA molecule.

Question 16

What is the correct sequence of mitotic stages?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 17

A cell is observed to have chromosomes that have separated and are moving toward opposite poles. Which stage of mitosis is this?

Accepted Answer

Anaphase

Question 18

Which of the following best explains why healthy cells stop dividing when they form a single layer?

Accepted Answer

They exhibit density-dependent inhibition.

Question 19

Which of the following is required for most animal cells to divide?

Accepted Answer

They must be attached to a surface (anchorage dependence).

Question 20

If a cell in G2 phase has 92 DNA molecules, how many DNA molecules will each daughter cell have after mitosis and cytokinesis?

Accepted Answer

46

Cell Cycle, Mitosis, and Cancer: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard