Question

Which phase of mitosis is responsible for uncoiling of chromosomes followed by nuclear membrane formation?

• A. Interphase
• B. Prophase
• C. Metaphase
• D. Anaphase
• E. Telophase

Answer 1

The correct option is E Telophase

During prophase, the nucleus disappears, spindle fibers form, and DNA condenses into chromosomes (sister chromatids). During metaphase, the sister chromatids align along the equator of the cell by attaching their centromeres to the spindle fibers. During anaphase, sister chromatids are separated at the centromere and are pulled towards opposite poles of the cell by the mitotic spindle. During telophase, chromosomes arrive at opposite poles and unwind (uncoil) into thin strands of DNA, the spindle fibers disappear, and the nuclear membrane reappears. Cytokinesis is the actual splitting of the cell membrane, which takes place by furrow formation in animal cell while plant cells form a cell plate that becomes the new cell wall. Cells enter the G${}_0$ (inactive) phase after they exit the cell cycle when they are not actively preparing to divide.Some cells remain in G${}_0$ phase permanently.