Punjab 9th Class Biology Chapter 5 Cell Cycle Class 9th Punjab

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Question 1 of 17

Biology

1. Which event distinguishes meiosis from mitosis?

Pairing of homologous chromosomes

Condensation of chromosomes

Loss of the nuclear membrane

Formation of metaphase plate

Question 1 of 17

Question 2 of 17

2. Prior to cell division, each chromosome replicates or duplicates its genetic material. The products are connected by a centromere and are called;

Sister chromosomes

Non-sister chromatids

Homologous chromosomes

Sister chromatids

Question 2 of 17

Question 3 of 17

3. In which stage of cell cycle, the cell is preparing enzymes for chromosome duplication?

M

S

G2

G1

Question 3 of 17

Question 4 of 17

4. What reason would you suggest for the fact that the total DNA content of each daughter cell is reduced during meiosis?

Half of the chromosomes form each gamete are broken

Chromosomes do not duplicate between meiosis I and II

Chromosomes do not duplicate during the interphase before meiosis I

Sister chromatids separate during anaphase of meiosis I

Question 4 of 17

Question 5 of 17

5. The process of mitosis ensures that;

Each new cell receives the proper number of chromosomes

Chromosomes duplicate without errors

Each new cell is genetically different from its parent

Cells will divide at the appropriate time

Question 5 of 17

Question 6 of 17

6. During which phase of mitosis spindles are formed?

Interphase

Prophase

Metaphase

G2

Question 6 of 17

Question 7 of 17

7. In which stage of the cell cycle most cells spend their lives?

Metaphase

Telophase

Interphase

Prophase

Question 7 of 17

Question 8 of 17

8. If you observe a cell like this one, what phase of mitosis is it?

Metaphase

Teleophase

Anaphase

Prophase

Question 8 of 17

Question 9 of 17

9. Which of the following is unique to mitosis and not a part of meiosis I?

Homologous chromosomes pair forming bivalents

Chromosome pairs are broken during anaphase

Homologous chromosomes cross over

Chromatids separate during anaphase

Question 9 of 17

Question 10 of 17

10. For mitosis, the chromosomes of cell duplicate during interphase. When do the chromosomes duplicate for meiosis?

Before meiosis I

Do not duplicate

During meiosis I

Before meiosis II

Question 10 of 17

Question 11 of 17

11. Cytokinesis in a plant cell is characterized by:

The equal division of homologous chromosomes

A pinching off of the cell membrane to divide the cell

The formation of a cell plate in the cytoplasm

The movement of the chromosomes from the metaphase plate

Question 11 of 17

Question 12 of 17

12. In which stage of the cell cycle each chromosome is duplicated and so it consists of two chromatids?

G1

G2

S

M

Question 12 of 17

Question 13 of 17

13. Between two mitotic division, the DNA of the cells is duplicated. When does get duplicated during meiosis I and meiosis II?

The DNA is duplicated during meiosis II

The DNA is duplicated between meiosis I and meiosis II

The DNA is not duplicated during meiosis I and meiosis II

The DNA is duplicated during meiosis I

Question 13 of 17

Question 14 of 17

14. Which of the following stage of cell division is very different for animal and plant cells?

Cytokinesis

Metaphase

Anaphase

Telophase

Question 14 of 17

Question 15 of 17

15. Which one is the difference between mitosis and meiosis I?

Homologous chromosome pairs synapse during meiosis but not mitosis

Spindles composed of microtubules are not required during meiosis

Homologous chromosome pairs synapse during mitosis

Chromosomes do not replicate in the interphase preceding meiosis

Question 15 of 17

Question 16 of 17

16. Which of the following distinguishes meiosis from mitosis?

The daughter cells are genetically different from the parent cell

Chromosomes undergo crossing over

All of the above.

The chromosome number is reduced

Question 16 of 17

Question 17 of 17

17. Find the correct statement.

Spindles are not required during meiosis

Chromosomes do not duplicate in the interphase preceding meiosis I

Homologous chromosomes form pairs during meiosis but not mitosis

Homologous chromosomes form pairs during mitosis

Question 17 of 17

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