Cell Division

Question 1:Diagram I shows the different stages in a cell division.(a)(i) Name the type of cell division.(a)(ii) Arrange the stages of the cell division in the correct sequence.(b)(i) Explain the chromosomal behaviour in stage C.(b)(ii) State one importance of the chromosomal behaviour in (b)(i).(c) Diagram II shows the involvement of cells produced by this type … Read more

Question 1:Figure I shows cells R and S undergoing cell division.(a)(i) Name the structures labelled K and M.(a)(ii) State the phase of division of cells R and S.(b) Cell R undergoes three consecutive divisions.(c)(i) Cell S undergoes the first nuclear division and produces two cells.Complete the diagram to show the chromosomes in one of the … Read more

Question 5:Figure 1 shows a cell at stage M in a cell cycle. Draw both cells that will be formed if the P chromosome does not separate. Answer: Question 6:Figure 2 shows the complete set of chromosomes of an individual.Figure 2(a) State the genetic disorder this individual has.(b) Explain how this individual is born with … Read more

Question 1:Name the sequences in the mitosis process. Answer:Prophase, metaphase, anaphase, telophase Question 2:What is the function of the centriole in the division of animal cells? Answer:To form spindle fibres Question 3:State one difference between mitosis metaphase and meiosis metaphase I. Answer:• At the mitotic metaphase stage, chromosomes are arranged on the equatorial plane whereas … Read more

Question 1:Give the definition of the following terms:(a) karyokinesis (b) cytokinesis (c) chromatin(d) homologous chromosomes Answer:(a) Karyokinesis is a stage in cell division that involves the division of nucleus.(b)Cytokinesis is the cytoplasm division stage.(c) Chromatin is double-stranded DNA that is coiled around histone proteins.(d) Homologous chromosomes is a pair of chromosomes from the same set of chromosomes, … Read more

Question 1:Explain why radiotherapy is used to control or stop the growth of cancer cells. Answer:Radiotherapy (RT) is a method used to treat cancer. This method uses high-powered ionising radiation to kill cancer cells. A high dose administration is administered to the target (tumor) to heal, control or reduce symptoms of the patient. However, adjacent … Read more