1.5.1 State that the cell-division cycle involves interphase, mitosis and cytokinesis.
The cell-division cycle involves interphase, mitosis and cytokinesis.
The cell-division cycle involves interphase, mitosis and cytokinesis.
1.5.2 State that interphase is an active period in the life of a cell when many biochemical reactions occur, as well as DNA transcription and DNA replication.
Interphase is an active period in the life of a cell when many biochemical reactions occur, as well as DNA transcription and DNA replication.
Interphase is an active period in the life of a cell when many biochemical reactions occur, as well as DNA transcription and DNA replication.
1.5.3 Describe the events that occur in the four phases of mitosis (prophase, metaphase, anaphase and telophase).
Mitosis contains four phases which are prophase, metaphase, anaphase, and telophase. During mitosis, chromatin fibers become tightly coiled and can be seen as chrmosomes. The chromosomes appear as two identical sister chromatids joined at the centromere. The mitotic spindle begins to from in the cytoplasm. Some of the microtubules that make up the spindle attach to the chromosomes. In metaphase the chromosomes line up on the cell equator, with each sister chromatid facing a different pole of the cell. During anaphase, the centromere replicates and the sister chromatids separate. These news chromosomes move to opposite poles, so that each pole of the cell contains a complete set of chromosomes. During telophase, the microtubules elongate the cell, further separating the two poles. Then the parent cell's nuclear encelope is broken down and fragments are used to form new nuclear envelopes.
Mitosis contains four phases which are prophase, metaphase, anaphase, and telophase. During mitosis, chromatin fibers become tightly coiled and can be seen as chrmosomes. The chromosomes appear as two identical sister chromatids joined at the centromere. The mitotic spindle begins to from in the cytoplasm. Some of the microtubules that make up the spindle attach to the chromosomes. In metaphase the chromosomes line up on the cell equator, with each sister chromatid facing a different pole of the cell. During anaphase, the centromere replicates and the sister chromatids separate. These news chromosomes move to opposite poles, so that each pole of the cell contains a complete set of chromosomes. During telophase, the microtubules elongate the cell, further separating the two poles. Then the parent cell's nuclear encelope is broken down and fragments are used to form new nuclear envelopes.
1.5.4 Explain how mitosis produces two genetically identical nuclei.
During mitosis, pairs of two identical chromosomes are pulled to opposite ends of the cell. These identical chromosomes contain the same genetic information as the chromosomes of the parent cell, so they are genetically identical. The two identical sets of chromsomes become the nuclei of the two daughter cells.
During mitosis, pairs of two identical chromosomes are pulled to opposite ends of the cell. These identical chromosomes contain the same genetic information as the chromosomes of the parent cell, so they are genetically identical. The two identical sets of chromsomes become the nuclei of the two daughter cells.
1.5.5 Outline the differences in mitosis and cytokinesis between animal and plant cells.
The differences in plant and animal cell mitosis exist because the plant cell has a cell wall. Mitosis in plant cells involves the formation of a cell plate that separates the two daughter cells, while animal cells use a cleavage furrow to separate the two new cells. Also, plant cells lack the centrioles involved in animal cell mitosis.
The differences in plant and animal cell mitosis exist because the plant cell has a cell wall. Mitosis in plant cells involves the formation of a cell plate that separates the two daughter cells, while animal cells use a cleavage furrow to separate the two new cells. Also, plant cells lack the centrioles involved in animal cell mitosis.
1.5.6 State that growth, tissue repair and asexual reproduction involve mitosis.
Growth, tissue repair and asexual reproduction involve mitosis.
Growth, tissue repair and asexual reproduction involve mitosis.
1.5.7 State that tumours (cancers) are the result of uncontrolled cell division and that these can occur in any organ.
Tumours (cancers) are the result of uncontrolled cell division and these can occur in any organ
Tumours (cancers) are the result of uncontrolled cell division and these can occur in any organ
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