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State the 4 stages of mitosis (2 marks)

Prophase, Metaphase, Anaphase and Telophase
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Answered by Becky M. • Biology tutor
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Explain the four stages of mitosis ( 8 marks).

DNA is replicated in interphase. 1) Prophase is first stage. Nuclear envelope breaks down and chromosomes condense and free in cytoplasm. Centrioles move to opposite ends of cell to form network of fibres ac...
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Answered by Becky M. • Biology tutor
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Describe transcription:

DNA Helicase unwinds the DNA double helix and the hydrogen bonds break.1 strand of exposed nucleotides acts as a base.RNA polymerase assembles RNA nucleotides across from the complementary nucleotides of the...
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Answered by Kate F. • Biology tutor
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Outline the process of the primary immune response to a pathogen.

The pathogen is first phagocytosed or engulfed by a phagocyte (either macrophage or neutrophil). The phagocyte seals the pathogen in an internal phagosome into which the phagocyte releases lysozymes. These l...
TD
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What are phagocytes and how do they protect the body?

Phagocytes are large irregularly shaped white blood cells that are involved in the non-specific immune system. They have the ability to engulf and digest foreign bodies, destroying them in a process known as...
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Answered by Atousa K. • Biology tutor
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