Bio – Chapter 4: Cell Cycle

1

What is the main significance of mitosis?

A Production of gametes B Genetic diversity C Growth and repair D Reduction of chromosome number

2

In plant cells, what structure forms during cytokinesis?

A Cleavage furrow B Phragmoplast C Cell plate D Spindle fibers

3

What is the result of non-disjunction during meiosis?

A Normal gametes B Gametes with an abnormal number of chromosomes C Increased genetic diversity D Cancer development

4

What is the main difference between mitosis and meiosis?

A Mitosis produces four daughter cells, meiosis produces two B Mitosis produces two identical diploid cells, meiosis produces four genetically diverse haploid cells C Mitosis occurs in germ cells, meiosis in somatic cells D Mitosis involves crossing over, meiosis does not

5

Which of the following is a benign tumor?

A A tumor that invades nearby tissues B A tumor that spreads to distant sites C A tumor that remains localized D A tumor that is always cancerous

6

Which of the following is a significance of mitosis?

A Production of gametes B Genetic diversity C Growth and repair of tissues D Reduction of chromosome number

7

During which phase of interphase is DNA replicated?

A G1 phase B S phase C G2 phase D G0 phase

8

Which type of tumor is cancerous and can spread to other parts of the body?

A Benign tumor B Malignant tumor C Metastatic tumor D Both B and C

9

What is the outcome of meiosis?

A Two identical diploid cells B Four identical haploid cells C Four genetically different haploid cells D Two genetically different diploid cells

10

Which of the following is a key difference between mitosis and meiosis?

A Mitosis produces haploid cells, meiosis produces diploid cells B Mitosis involves one division, meiosis involves two divisions C Mitosis occurs only in germline cells, meiosis occurs in somatic cells D Mitosis results in genetic diversity, meiosis does not

11

Which phase of the cell cycle is the longest and includes G1, S, and G2?

A Interphase B Mitotic phase C Cytokinesis D Karyokinesis

12

During which stage of meiosis does crossing over occur?

A Prophase I B Metaphase I C Anaphase I D Prophase II

13

During which stage of meiosis do homologous chromosomes separate?

A Anaphase I B Anaphase II C Metaphase I D Metaphase II

14

What is the main significance of meiosis?

A It produces identical daughter cells for growth B It reduces chromosome number and creates genetic diversity C It repairs damaged tissues D It replicates DNA during interphase

15

Which phase of the cell cycle is a temporary exit where cells perform normal functions but do not prepare for division?

A G0 phase B G1 phase C S phase D G2 phase

16

What happens during metaphase?

A Chromosomes align at the metaphase plate B Chromosomes move to opposite poles C Nuclear envelope reforms D DNA replicates

17

Which phase of mitosis involves the separation of sister chromatids and their movement to opposite poles?

A Prophase B Metaphase C Anaphase D Telophase

18

Which of the following is a significant role of mitosis in multicellular organisms?

A Production of gametes B Genetic diversity C Growth and repair of tissues D Reduction of chromosome number

19

What is the result of meiosis II?

A Two diploid cells B Four haploid cells C Two haploid cells D Four diploid cells

20

Which phase of the cell cycle is the longest?

A Prophase B Interphase C Metaphase D Anaphase

21

Which of the following is a temporary exit from the cell cycle?

A G0 phase B S phase C G2 phase D Prophase

22

During which phase of meiosis does crossing over occur?

A Prophase I B Metaphase I C Prophase II D Metaphase II

23

What is the main event of anaphase in mitosis?

A Chromosomes line up at the metaphase plate B Sister chromatids separate and move to opposite poles C Nuclear envelope reforms D Chromosomes condense

24

What forms during cytokinesis in plant cells?

A Cleavage furrow B Cell plate C Spindle fibers D Contractile ring

25

During which phase of meiosis do homologous chromosomes separate?

A Anaphase I B Anaphase II C Metaphase I D Telophase I