Question 1

Which of the following best describes the hierarchical organization of biological systems, from smallest to largest?

Accepted Answer

Atom, molecule, cell, tissue, organ, organism, population, community, ecosystem

Question 2

Which phase of the cell cycle is primarily responsible for DNA replication?

Accepted Answer

S phase

Question 3

A human cell contains 46 chromosomes. How many chromosomes are inherited from the mother?

Accepted Answer

$$23$$

Question 4

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry the same genes but may have different alleles.

Question 5

During which phase of mitosis do sister chromatids separate and move toward opposite poles?

Accepted Answer

Anaphase

Question 6

What is the main difference between autosomes and sex chromosomes in humans?

Accepted Answer

Autosomes are chromosomes 1-22, while sex chromosomes are X and Y.

Question 7

Cancer cells are characterized by which of the following?

Accepted Answer

Uncontrolled cell division due to loss of cell cycle regulation

Question 8

If a diploid human cell undergoes mitosis, how many daughter cells are produced and how do they compare genetically to the parent cell?

Accepted Answer

Two daughter cells, each genetically identical to the parent cell

Question 9

Which of the following best describes the outcome of meiosis in humans?

Accepted Answer

One diploid cell divides to produce four non-identical haploid cells

Question 10

Which of the following is an example of a haploid cell in humans?

Accepted Answer

Sperm cell

Question 11

During which stage of meiosis do homologous chromosomes separate?

Accepted Answer

Anaphase I

Question 12

How many autosomes are present in a normal human karyotype?

Accepted Answer

$$44$$

Question 13

Which of the following events occurs during the S phase of interphase?

Accepted Answer

DNA is replicated

Question 14

A cell with $$2n = 46$$ chromosomes undergoes meiosis. How many chromosomes will each resulting gamete contain?

Accepted Answer

$$23$$

Question 15

Which of the following best describes the structure of DNA?

Accepted Answer

A double helix composed of two antiparallel strands

Question 16

Which process restores the diploid number of chromosomes in humans after meiosis?

Accepted Answer

Fertilization

Question 17

Which of the following is true about the products of meiosis compared to mitosis?

Accepted Answer

Meiosis produces four genetically different cells; mitosis produces two genetically identical cells.

Question 18

Which of the following best explains why cancer is related to the cell cycle?

Accepted Answer

Cancer cells divide uncontrollably due to loss of regulation in the cell cycle.

Question 19

Which of the following is a correct sequence of the phases of mitosis?

Accepted Answer

Prophase, Metaphase, Anaphase, Telophase

Question 20

Which of the following best describes a sister chromatid?

Accepted Answer

One of two identical DNA molecules joined at a centromere

Cell Cycle, Mitosis, and Meiosis: Structure, Function, and Regulation

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