Question 1

Which of the following best describes the function of the centromere during mitosis?

Accepted Answer

It holds sister chromatids together and attaches them to spindle fibers via the kinetochore.

Question 2

If a human somatic cell contains 46 chromosomes, how many chromosomes will be present in a human gamete after meiosis?

Accepted Answer

$$23$$

Question 3

Which of the following events occurs during the S phase of the cell cycle?

Accepted Answer

DNA is replicated, resulting in two sister chromatids per chromosome.

Question 4

A cell fails to pass the G1 checkpoint. What is the most likely outcome for this cell?

Accepted Answer

It will enter the G0 phase and stop dividing.

Question 5

Which of the following statements about cyclins is correct?

Accepted Answer

Cyclin concentrations fluctuate, regulating progression through the cell cycle.

Question 6

Which of the following best explains why chromosomes are so densely packed during mitosis?

Accepted Answer

Dense packing protects DNA from damage and ensures accurate segregation.

Question 7

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

Accepted Answer

Plant cells form a cell plate, while animal cells form a cleavage furrow.

Question 8

A cell with a mutation in a gene encoding a cyclin-dependent kinase (CDK) cannot progress past the G2 checkpoint. What is the most likely consequence?

Accepted Answer

The cell will remain in G2 and not divide.

Question 9

Which of the following best describes the process of crossing over during meiosis?

Accepted Answer

Exchange of genetic material between homologous chromosomes at chiasmata.

Question 10

If an organism has a diploid number $$2n = 24$$, what is its haploid number?

Accepted Answer

$$12$$

Question 11

Which of the following is NOT a way that cancer cells differ from normal cells?

Accepted Answer

Cancer cells exhibit density-dependent inhibition.

Question 12

Which of the following best explains how meiosis leads to genetic variation in offspring?

Accepted Answer

Through crossing over and independent assortment of chromosomes.

Question 13

A karyotype is most useful for which of the following purposes?

Accepted Answer

Identifying chromosomal abnormalities such as trisomy.

Question 14

Which of the following best describes the role of kinetochores during mitosis?

Accepted Answer

They attach chromosomes to spindle fibers for segregation.

Question 15

If a cell has 20 chromosomes in its gametes, how many chromosomes will its somatic cells have?

Accepted Answer

$$40$$

Question 16

Which of the following is a direct result of apoptosis in multicellular organisms?

Accepted Answer

Programmed cell death that helps shape tissues during development.

Question 17

Which of the following best describes independent assortment during meiosis?

Accepted Answer

Chromosomes are randomly distributed to gametes, creating genetic diversity.

Question 18

Which of the following is a function of histones in eukaryotic cells?

Accepted Answer

They package DNA into nucleosomes, aiding in chromosome structure.

Question 19

Which of the following is a plausible consequence if a cell loses its ability to undergo apoptosis?

Accepted Answer

The cell may accumulate mutations and contribute to tumor formation.

Question 20

Which of the following best explains why every gamete produced through meiosis has a unique combination of DNA?

Accepted Answer

Because of crossing over and independent assortment during meiosis.

Cell Cycle, Cell Cycle Regulation, and Meiosis: Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards