Which of the following statements about mitosis is true O a

Which of the following statements about mitosis is true? O a. Mitosis produces two daughter cells identical to the mother cell. b Mitosis is the division of the nuclear component (DNA) which is then followed by the division of the cytoplasm (cytokinesis). C.A mitotically dividing cell copies its DNA, separates these copies at opposite poles and then divides. d All of the above O e. A and B only

Solution

1. Answer: a. Mitosis produces two daughter cells identical to the mother cell.

Explanation- The chromosomes undergo duplication before mitosis. After this, identical chromosomes reach daughter cells.

2. Answer: b. During metaphase, chromosomes align at the metaphase plate, the equator of the mitotic spindle

Explanation- The chromosomes align at the centre of the mitotic spindle and the two kinetochores of each chromosome get attached to the microtubules from opposite poles of the spindle.

3. Interphase- D. Cell growth. Replication of DNA.

Prophase- G. The chromosomes condense, each with two sister chromatids. Mitotic spindle begins to form.

Prometaphase- C. The nuclear envelope breaks down and the chromosomes attach to the mitotic spindle at their kinetochores.

Metaphse- A. Chromosomes align at the equator of the mitotic spindle. For each chromosome, the sister chromatids are attached at the kinetochore to microtubules from opposing poles.

Anaphase- E. The sister chromatids are pulled apart to opposite poles of the mitotic spindle.

Telophase- F. A nuclear membrane forms around each set of chromosomes at the mitotic spindle\'s poles. Mitosis ends.

Cytokinesis- B. Cell pinches in until cytoplasm is divided in two (in animal cells). Results in two daughter cells that each contain a nucleus.

Explanation- Mitosis comprises of four basic phases, which according to their order are- prophase, metaphase, anaphase, and telophase. Prometaphase is the late phase of prophase. Cytokinesis is the division of the cytoplasm. Interphase is the preparatory stage of mitosis.