Q: Which formula represents the total length of DNA in the human body, given that each cell contains 2 meters of DNA and there are approximately $$3.7 \times 10$$^{13}$$ cells?

$$2 \times 3.7 \times 10$$^{13}$$ meters

Question 1

Which of the following best describes the main function of mitosis in multicellular organisms?

Accepted Answer

To enable growth, repair, and maintenance by producing genetically identical cells

Question 2

During which phase of the eukaryotic cell cycle is the entire genome duplicated?

Accepted Answer

S phase

Question 3

What is the primary difference between asexual and sexual reproduction in terms of genetic outcome?

Accepted Answer

Asexual reproduction produces clones, while sexual reproduction mixes genes from two parents

Question 4

Which structure is responsible for guiding chromosome separation during mitosis?

Accepted Answer

Mitotic spindle

Question 5

If a cell has 8 chromosomes before the S phase, how many chromatids will it have after the S phase?

Accepted Answer

16

Question 6

Which event occurs during prometaphase of mitosis?

Accepted Answer

Nuclear envelope breaks down and chromosomes attach to spindle fibers

Question 7

What is the role of ATP during anaphase?

Accepted Answer

ATP powers motor proteins that move chromatids along microtubules

Question 8

Which of the following best explains why chromosomes condense before cell division?

Accepted Answer

Condensation prevents chromosomes from being lost or damaged during separation

Question 9

A mutation causes a cell to skip the G2 phase. Which consequence is most likely?

Accepted Answer

The cell may enter mitosis without proper preparation, increasing risk of errors

Question 10

Which formula represents the total length of DNA in the human body, given that each cell contains 2 meters of DNA and there are approximately $$3.7 	imes 10$$^{13}$$ cells?

Accepted Answer

$$2 	imes 3.7 	imes 10$$^{13}$$ meters

Question 11

Which of the following is NOT found in the cell’s nucleus?

Accepted Answer

Ribosomes

Question 12

In prokaryotes, which process is used for asexual reproduction?

Accepted Answer

Binary fission

Question 13

Which phase of mitosis is characterized by chromosomes lining up at the cell’s center?

Accepted Answer

Metaphase

Question 14

What happens to the nuclear envelope during telophase?

Accepted Answer

It reforms around the chromosomes

Question 15

Which of the following best describes cytokinesis in animal cells?

Accepted Answer

Cleavage furrow contracts to split the cell

Question 16

A scientist observes a cell with condensed chromosomes, a broken nuclear envelope, and spindle fibers attaching to kinetochores. Which phase is the cell in?

Accepted Answer

Prometaphase

Question 17

Which of the following is a consequence of misregulation of the cell cycle?

Accepted Answer

Formation of cancerous cells

Question 18

Which equation best represents the number of chromosomes after mitosis, if a cell starts with $$n$$ chromosomes?

Accepted Answer

$$n$$

Question 19

Which of the following is true about the time spent in interphase versus mitosis?

Accepted Answer

Cells spend about 90% of their lifetime in interphase

Question 20

Which of the following best describes the relationship between chromatin and chromosomes?

Accepted Answer

Chromatin is condensed to form chromosomes during cell division

Cell Division and Mitosis: Structure, Function, and Mechanisms

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