Mitosis

A cell that has 16 chromosomes divides twice by mitosis. How many chromosomes are in each of the cells formed?

Feb/March 2017

Cell division carries out the following functions. Which of these functions are specific to mitosis?

Feb/March 2018

Cell division performs the following roles. Which of these roles are unique to mitosis?

Feb/March 2018

What occurs as a result of mitosis?

Feb/March 2019

Which row indicates the characteristics of stem cells?

Feb/March 2020

State how the mass of DNA has changed immediately before mitosis in Fig. 5.1.

Feb/March 2020

The diagram illustrates the formation of a male embryo. Which row identifies the sex chromosomes in the cells and the type of cell division at P?

Feb/March 2021

A sunflower contains 17 chromosomes in each pollen nucleus. These nuclei are formed by the process of in the anthers. They are genetically all the pollen nuclei produced by those anthers. Once fertilisation has occurred, the zygote that is formed will have chromosomes. Which row correctly fills gaps 1, 2 and 3?

Feb/March 2021

The mitotic index of a tissue is the proportion of cells in the tissue that are undergoing division by mitosis. The table gives details about two tissue samples, X and Y. Which statement is correct?

Feb/March 2024

The graph illustrates the way the mass of DNA varies during mitotic cell division. At which point on the graph are two cells produced?

Feb/March 2025

As a cell undergoes division, the following takes place. 1 The DNA within the cell is copied precisely. 2 The daughter cells formed have the same number of chromosomes as the parent cell. Which type of division has taken place?

May/June 2016

Which of the following statements about mitosis are correct?

May/June 2017

What is formed when a cell goes through mitosis once?

May/June 2017

What are the roles of meiosis and mitosis?

May/June 2017

The mitotic index of a tissue is the percentage of cells in a tissue that are dividing. The table gives the number of cells in two tissue samples, X and Y. Which statement is correct?

May/June 2018

Which graph shows the correct variation in the mass of DNA in one cell during cell division by mitosis?

May/June 2018

The diagram illustrates the chromosomes present in the nucleus of a cell undergoing mitosis. Which diagram shows the chromosomes in the nucleus of one of the daughter cells formed?

May/June 2019

The diagram illustrates the chromosomes inside the nucleus of a cell that undergoes mitosis. Which diagram shows the chromosomes in the nucleus of one of the daughter cells formed?

May/June 2019

The diagram illustrates the chromosomes in the nucleus of a cell that undergoes mitosis. Which diagram represents the chromosomes in the nucleus of one of the daughter cells formed?

May/June 2019

Fig. 6.1 illustrates several cells taken from the shoot tip of an onion, Allium cepa.

May/June 2019

Which diagram illustrates the results of the process of mitosis?

May/June 2021

A few reptiles are able to shed and then replace their tails to escape predators. Which process is involved in tail regrowth?

May/June 2021

A number of statements about mitosis are given below. Which of the statements are correct?

May/June 2021

Which statement gives the correct definition of mitosis?

May/June 2021

A form of nuclear division creates cells that are genetically identical.

May/June 2022

The graph illustrates the way the mass of DNA per cell changes before, during and after a nuclear division in a diploid cell. Which row identifies the type of nuclear division and the chromosome number of the daughter cells represented in the graph?

May/June 2024

Meiosis and mitosis are key events in the life cycles of organisms. Fig. 3.1 illustrates the life cycles of two different organisms. Organism 1 has a simple life cycle. Organism 2 has a more complex life cycle. It includes a stage A that makes spores and a stage B that makes gametes. In the diagrams, the haploid chromosome number is shown by $n$. The diploid chromosome number is shown by $2n$.

May/June 2024

The diagram illustrates the chromosomes in the nucleus of a cell undergoing mitosis. Which diagram shows the chromosomes in the nucleus of one of the daughter cells formed?

May/June 2025

The diagram shows the cells of a mammalian embryo soon after fertilisation. Which description is correct for these cells?

May/June 2025

What occurs during mitosis?

Oct/Nov 2016

The diagram illustrates a cell just before mitosis and while mitosis is taking place. During which stage are the chromosomes replicated?

Oct/Nov 2017

The diagram illustrates a cell from an organism. The nucleus has 12 chromosomes. After it divides by mitosis, how many chromosomes would be in one daughter cell?

Oct/Nov 2018

The diagram illustrates a diploid cell with alleles $R$ and $r$ on one homologous pair of chromosomes. When this cell undergoes mitosis, which daughter cells are formed?

Oct/Nov 2019

The diagram illustrates a diploid cell and the alleles R and r on one pair of chromosomes. As this cell undergoes mitosis, which daughter cells will be formed?

Oct/Nov 2019

The diagram depicts a diploid cell with alleles R and r on one homologous pair of chromosomes. If this cell undergoes mitosis, which daughter cells would be formed?

Oct/Nov 2019

Which of the following are functions of mitosis?

Oct/Nov 2021

Which row gives the correct description of mitosis?

Oct/Nov 2022

Which row gives the correct information about mitosis?

Oct/Nov 2023

The diagram illustrates the chromosomes in a cell after replication has taken place and immediately before the cell divides by mitosis. Which pair of cells will be formed at the end of mitosis?

Oct/Nov 2023

The diagram illustrates how the mass of DNA in one cell changes before, during and after mitosis. What process is taking place at X on the graph?

Oct/Nov 2024

Which graph displays the mean mass of DNA per cell before, during and after mitosis?

Oct/Nov 2024

What is meant by stem cells?

Oct/Nov 2025