Biology 9700 · AS & A Level · Testing for biological molecules
Testing for biological molecules — practice question
Fig. 1.1 shows a photomicrograph of a root tip meristem. Cells can be seen in different parts of the cell cycle. Some cells are at the same point in the cell cycle, and some are at the same point in mitosis.
(a)[1]
Cell D and cell E are at the same point in the cell cycle. State the difference between the nucleus of cell D and the nucleus of cell E.
(b)[3]
Identify the stage of mitosis taking place in each of cells A, B and C.
(c)[2]
Cells F and G are newly formed cells. Cytokinesis has taken place and a cell plate has formed. Describe the events that happened in the mitotic stage immediately before cytokinesis.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Cell D contains two nucleoli, while cell E contains one nucleolus” …