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

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Question 1 of 17

Biology

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

Chromosomes do not duplicate during the interphase before meiosis I

Half of the chromosomes form each gamete are broken

Chromosomes do not duplicate between meiosis I and II

Sister chromatids separate during anaphase of meiosis I

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;

Non-sister chromatids

Sister chromatids

Sister chromosomes

Homologous chromosomes

Question 2 of 17

Question 3 of 17

3. Which of the following distinguishes meiosis from mitosis?

The daughter cells are genetically different from the parent cell

All of the above.

The chromosome number is reduced

Chromosomes undergo crossing over

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 equal division of homologous chromosomes

The movement of the chromosomes from the metaphase plate

Question 4 of 17

Question 5 of 17

5. The process of mitosis ensures that;

Cells will divide at the appropriate time

Each new cell receives the proper number of chromosomes

Each new cell is genetically different from its parent

Chromosomes duplicate without errors

Question 5 of 17

Question 6 of 17

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

Homologous chromosomes cross over

Homologous chromosomes pair forming bivalents

Chromatids separate during anaphase

Chromosome pairs are broken during anaphase

Question 6 of 17

Question 7 of 17

7. During which phase of mitosis spindles are formed?

G2

Metaphase

Prophase

Interphase

Question 7 of 17

Question 8 of 17

8. 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 I

The DNA is not duplicated during meiosis I and meiosis II

The DNA is duplicated during meiosis II

The DNA is duplicated between meiosis I and meiosis II

Question 8 of 17

Question 9 of 17

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

Spindles composed of microtubules are not required during meiosis

Homologous chromosome pairs synapse during meiosis but not mitosis

Chromosomes do not replicate in the interphase preceding meiosis

Homologous chromosome pairs synapse during mitosis

Question 9 of 17

Question 10 of 17

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

Teleophase

Anaphase

Metaphase

Prophase

Question 10 of 17

Question 11 of 17

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

G1

G2

S

M

Question 11 of 17

Question 12 of 17

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

Before meiosis II

During meiosis I

Do not duplicate

Before meiosis I

Question 12 of 17

Question 13 of 17

13. Find the correct statement.

Chromosomes do not duplicate in the interphase preceding meiosis I

Spindles are not required during meiosis

Homologous chromosomes form pairs during mitosis

Homologous chromosomes form pairs during meiosis but not mitosis

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

Anaphase

Metaphase

Telophase

Question 14 of 17

Question 15 of 17

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

Metaphase

Telophase

Prophase

Interphase

Question 15 of 17

Question 16 of 17

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

G1

G2

S

M

Question 16 of 17

Question 17 of 17

17. Which event distinguishes meiosis from mitosis?

Pairing of homologous chromosomes

Condensation of chromosomes

Formation of metaphase plate

Loss of the nuclear membrane

Question 17 of 17

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