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

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Question 1 of 17

Biology

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

Metaphase

Interphase

Telophase

Prophase

Question 1 of 17

Question 2 of 17

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

Spindles composed of microtubules are not required during meiosis

Chromosomes do not replicate in the interphase preceding meiosis

Homologous chromosome pairs synapse during mitosis

Homologous chromosome pairs synapse during meiosis but not mitosis

Question 2 of 17

Question 3 of 17

3. Which event distinguishes meiosis from mitosis?

Pairing of homologous chromosomes

Loss of the nuclear membrane

Condensation of chromosomes

Formation of metaphase plate

Question 3 of 17

Question 4 of 17

4. Cytokinesis in a plant cell is characterized by:

The formation of a cell plate in the cytoplasm

A pinching off of the cell membrane to divide the cell

The movement of the chromosomes from the metaphase plate

The equal division of homologous chromosomes

Question 4 of 17

Question 5 of 17

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

The DNA is not duplicated during meiosis I and meiosis II

The DNA is duplicated between meiosis I and meiosis II

The DNA is duplicated during meiosis II

The DNA is duplicated during meiosis I

Question 5 of 17

Question 6 of 17

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

Before meiosis I

During meiosis I

Before meiosis II

Do not duplicate

Question 6 of 17

Question 7 of 17

7. Find the correct statement.

Spindles are not required during meiosis

Homologous chromosomes form pairs during mitosis

Chromosomes do not duplicate in the interphase preceding meiosis I

Homologous chromosomes form pairs during meiosis but not mitosis

Question 7 of 17

Question 8 of 17

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

M

G1

S

G2

Question 8 of 17

Question 9 of 17

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

Metaphase

Cytokinesis

Telophase

Anaphase

Question 9 of 17

Question 10 of 17

10. The process of mitosis ensures that;

Each new cell is genetically different from its parent

Chromosomes duplicate without errors

Each new cell receives the proper number of chromosomes

Cells will divide at the appropriate time

Question 10 of 17

Question 11 of 17

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

Chromatids separate during anaphase

Chromosome pairs are broken during anaphase

Homologous chromosomes pair forming bivalents

Homologous chromosomes cross over

Question 11 of 17

Question 12 of 17

12. 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 during the interphase before meiosis I

Sister chromatids separate during anaphase of meiosis I

Chromosomes do not duplicate between meiosis I and II

Question 12 of 17

Question 13 of 17

13. During which phase of mitosis spindles are formed?

Interphase

Prophase

G2

Metaphase

Question 13 of 17

Question 14 of 17

14. Which of the following distinguishes meiosis from mitosis?

All of the above.

The chromosome number is reduced

Chromosomes undergo crossing over

The daughter cells are genetically different from the parent cell

Question 14 of 17

Question 15 of 17

15. 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 15 of 17

Question 16 of 17

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

M

S

G2

G1

Question 16 of 17

Question 17 of 17

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

Metaphase

Teleophase

Anaphase

Prophase

Question 17 of 17

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