Mitosis Exam Study Questions and
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What is mitosis and the cell cycle controlled by? - Answer Mitosis and the cell cycle are
controlled by genes
What are the main benefits of mitosis? - Answer Growth and repair of damaged tissues
Describe the stages in mitosis - Answer In prophase, DNA coils to form chromosomes,
nucleus breaksdown and spindle fibres form. In metaphase chromosomes line up at
the equator of the cell and attach to spindle fibre via centromere. In anaphase the
spindle fibres pull, centromere splits, and sister chromatids move to opposite poles of
the cell. In telophase: chromatids uncoil, nucleus reforms. In cytokinesis, the cytoplasm
splits and the cells are separated from each other.
In mitosis, what happens to the DNA mass and the chromosome number? - Answer In
mitosis the DNA mass halves and the chromosomes number stays the same.
What is cancer? - Answer Cancer is the formation of a tumour due to uncontrolled
cell division, that is uncontrolled mitosis. The tumour invades surrounding tissue.
How does uncontrolled cell division occur? - Answer Uncontrolled cell division is due to
a mutation of DNA. Mutations can occur randomly or due to mutagens. Cancer cells
are rapidly dividing cells. They spend less time in interphase and more time in mitosis.
, What types of treatments are available for cancer patients. - Answer Surgical,
chemotherapy, radiotherapy
The events that take place during interphase in mitosis leads to the production of
two genetically identical cells. EXPLAIN how. - Answer DNA replication takes place
during interphase which involves specific complementary base pairing taking place.
Sister chromatids move to opposite poles.
Mikanolide is a drug that inhibits the enzyme DNA polymerase. Explain why this
drug may be effective against some types of cancer. - Answer Prevents DNA
replication. Prevents mitosis. Nucleotides of new strand not joined together.
IPMAT - Answer Interphase, prophase, metaphase, anaphase, telophase.
Describe the role of the centromere in mitosis. - Answer Holds chromatids together.
Attaches chromatids to spindle.
Allows chromatids to move to opposite poles.
Cells lining the human intestine complete the cell cycle in a short time. Explain the
advantage of these cells completing the cell cycle in a short time. - Answer Replace cells
rapidly.
Homologous chromosomes carry the same genes but they are not genetically
identical. Explain why. - Answer Homologous chromosomes carry different alleles
Other than independent segregation, give 2 ways in which meiosis allows the
production of genetically different cells. - Answer Crossing over where alleles are
exchanged between chromosomes.
Genetic recombination
100% Correct Verified Solutions|
Latest Update
What is mitosis and the cell cycle controlled by? - Answer Mitosis and the cell cycle are
controlled by genes
What are the main benefits of mitosis? - Answer Growth and repair of damaged tissues
Describe the stages in mitosis - Answer In prophase, DNA coils to form chromosomes,
nucleus breaksdown and spindle fibres form. In metaphase chromosomes line up at
the equator of the cell and attach to spindle fibre via centromere. In anaphase the
spindle fibres pull, centromere splits, and sister chromatids move to opposite poles of
the cell. In telophase: chromatids uncoil, nucleus reforms. In cytokinesis, the cytoplasm
splits and the cells are separated from each other.
In mitosis, what happens to the DNA mass and the chromosome number? - Answer In
mitosis the DNA mass halves and the chromosomes number stays the same.
What is cancer? - Answer Cancer is the formation of a tumour due to uncontrolled
cell division, that is uncontrolled mitosis. The tumour invades surrounding tissue.
How does uncontrolled cell division occur? - Answer Uncontrolled cell division is due to
a mutation of DNA. Mutations can occur randomly or due to mutagens. Cancer cells
are rapidly dividing cells. They spend less time in interphase and more time in mitosis.
, What types of treatments are available for cancer patients. - Answer Surgical,
chemotherapy, radiotherapy
The events that take place during interphase in mitosis leads to the production of
two genetically identical cells. EXPLAIN how. - Answer DNA replication takes place
during interphase which involves specific complementary base pairing taking place.
Sister chromatids move to opposite poles.
Mikanolide is a drug that inhibits the enzyme DNA polymerase. Explain why this
drug may be effective against some types of cancer. - Answer Prevents DNA
replication. Prevents mitosis. Nucleotides of new strand not joined together.
IPMAT - Answer Interphase, prophase, metaphase, anaphase, telophase.
Describe the role of the centromere in mitosis. - Answer Holds chromatids together.
Attaches chromatids to spindle.
Allows chromatids to move to opposite poles.
Cells lining the human intestine complete the cell cycle in a short time. Explain the
advantage of these cells completing the cell cycle in a short time. - Answer Replace cells
rapidly.
Homologous chromosomes carry the same genes but they are not genetically
identical. Explain why. - Answer Homologous chromosomes carry different alleles
Other than independent segregation, give 2 ways in which meiosis allows the
production of genetically different cells. - Answer Crossing over where alleles are
exchanged between chromosomes.
Genetic recombination
