Tag: structure of chromosome, cell cycle and cell division
Questions Related to structure of chromosome, cell cycle and cell division
The cell is not allowed to past the cell cycle restriction point, DNA damage is detected. Which of the following proteins are involved in detection of DNA damage and inhibition of cycle at the restriction point?
In order to enter cell cycle a cell must be stimulated from outside. What type of molecule provides this stimulation?
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(i) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phases.
(ii) In the 24 hours average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.
(iii) M phase constitutes more than 95% of the duration of cell cycle.
How many following statements are correct?
(A) Nucleus as a cell organelle was first described by Robert Brown as early as 1651.
(B) The interphase nucleus has highly condensed nucleoprotein fibres called chromatin.
(C) During different stages of cell division, cells show structured chromatin in place of the nucleus.
(D) Every chromosome essentially has a primary constriction which is also known as NOR.
(E) Many membrane-bound minute vesicles called microbodies that contain various enzymes are present in both plant and animal cells.