The drug colchicines, used to obtain polyploidy cells, acts on the cytoskeletal structures of
the plant cells called
1. | microtubules |
2. | actin filaments |
3. | intermediate filaments |
4. | all of the above. |
Number of mitotic division required in a cell of root tip for formation of 128 cells is
1. 12
2. 3
3. 7
4. 6
Microtubule depolymerizing drug such as colchicine is expected to
1. | inhibit spindle formation during mitosis |
2. | inhibit cytokinesis |
3. | allow mitosis beyond metaphase |
4. | induce formation of multiple contractile |
Which of the following statements is True?
1. | Cell plate represents the middle lamella between the walls of two adjacents cells |
2. | At the time of cytokinesis, organelles like mitochondria and plastids get distributed between the daughter cells |
3. | Cytokinesis in plant cell is centrifugal and takes place by cell-plate formation while animal cells by furrowing / cleavage and is centripetal |
4. | All are correct |
Cytokinesis in animal cell takes place by _______; in _______ direction while in plant cell by _______; in _______ direction:
(1) Furrowing, centrifugal, cell plate, centripetal
(2) Furrowing, centripetal, cell plate, Centrifugal
(3) Cell plate, centrifugal, furrowing, centripetal
(4) Cell plate, centripetal, furrowing, centrifugal