Q: During which phase of the cell cycle does DNA replication occur? Write the phase name and the corresponding equation for DNA content doubling.

S phase; $$C_{final} = 2 \times C_{initial}$$

Q: Which equation best represents the relationship between the number of genes and chromosomes in humans?

$$\text{Genes} \u003e \text{Chromosomes}$$

Question 1

Which of the following best describes the main difference between mitosis and meiosis in terms of their biological outcomes?

Accepted Answer

Mitosis results in two identical daughter cells, while meiosis results in four genetically unique haploid gametes.

Question 2

A strawberry plant produces new plants via runners (stolons), as shown in the first image. What type of reproduction is this, and what is a key advantage?

Accepted Answer

Asexual reproduction; it allows rapid colonization of an area.

Question 3

Which process is responsible for the regeneration of a starfish arm, as depicted in the second image?

Accepted Answer

Mitosis

Question 4

During which phase of the cell cycle does DNA replication occur? Write the phase name and the corresponding equation for DNA content doubling.

Accepted Answer

S phase; $$C_{final} = 2 	imes C_{initial}$$

Question 5

Which of the following is NOT a function of mitosis in multicellular organisms?

Accepted Answer

Production of gametes

Question 6

A human cell with 46 chromosomes undergoes mitosis. How many chromosomes will each daughter cell have after division?

Accepted Answer

$$46$$

Question 7

Which structure is responsible for holding sister chromatids together during mitosis, as shown in the chromosome diagram?

Accepted Answer

Centromere

Question 8

If a mutation occurs during DNA replication in the S phase, what is the most likely outcome for the daughter cells after mitosis?

Accepted Answer

Both daughter cells will have the mutation.

Question 9

Which of the following equations correctly represents the chromosome number change during meiosis in humans?

Accepted Answer

$$2n \rightarrow n$$

Question 10

Which of the following best explains why asexual reproduction is advantageous in stable environments?

Accepted Answer

It produces offspring rapidly without the need for a mate.

Question 11

A scientist observes a cell with condensed chromosomes aligned at the center of the cell. Which stage of mitosis is being observed?

Accepted Answer

Metaphase

Question 12

Which of the following statements about chromatin is correct?

Accepted Answer

Chromatin is a mixture of DNA and protein that makes up chromosomes.

Question 13

Which equation best represents the relationship between the number of genes and chromosomes in humans?

Accepted Answer

$$	ext{Genes} \u003e 	ext{Chromosomes}$$

Question 14

Which of the following is a real-life example of binary fission?

Accepted Answer

Bacteria dividing to form two identical cells

Question 15

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

Accepted Answer

One cell with two nuclei

Question 16

Which phase of the cell cycle is the longest and why?

Accepted Answer

Interphase; because it includes cell growth and DNA replication

Question 17

A mutation in the gene encoding for the centromere protein would most likely affect which process?

Accepted Answer

Chromosome segregation during mitosis

Question 18

Which of the following best describes the role of mitosis in tissue repair?

Accepted Answer

It produces identical cells to replace damaged or lost cells.

Question 19

Which of the following is true about the chromosome number in gametes compared to somatic cells in humans?

Accepted Answer

Gametes have half as many chromosomes as somatic cells.

Question 20

A researcher observes a cell with visible chromosomes but no nuclear envelope. Which stage of mitosis is most likely being observed?

Accepted Answer

Prophase

Cell Division, Cell Cycle, and Mitosis: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards