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Combined Science: Biology

GCSE · Edexcel · foundation

QuestionsFlashcards

Disease
Defence Against Disease
Development of Medicines
- Antibiotics
  4
- Discovery & Development of New Drugs
  3
Non-Communicable Diseases
- Lifestyle & Non-Communicable Disease
  7
- Cardiovascular Disease
  6

The Organism in the Environment
Human Influences on the Environment
- Human Impact on Biodiversity
  6
- Benefits of Maintaining Biodiversity
  4
Cycles within Ecosystems

Cell Division Flashcards

All 11 cards in this deck

Name the stages of the cell cycle in order, starting with interphase.: Interphase, prophase, metaphase, anaphase, telophase, cytokinesis.
What happens during interphase of the cell cycle?: The DNA is copied (and the cell grows, making more sub-cellular structures).
In which stage of mitosis are the chromosomes lined up along the middle (equator) of the cell?: Metaphase.
In which stage of mitosis do the spindle fibres pull the chromosomes to either side (the poles) of the cell?: Anaphase.
How many daughter cells does mitosis produce, and what is their genetic nature?: Two daughter cells, genetically identical to each other and the parent cell, and diploid.
Give the three reasons why mitosis is important in living things.: For growth, for repair (of tissues/organs) and for asexual reproduction.
What is cancer?: The result of changes in cells that lead to uncontrolled cell division.
What is a tumour?: A mass (lump) of cells formed by uncontrolled cell division.
What happens during prophase of mitosis?: The chromosomes condense (coil up, becoming shorter and thicker) and the membrane around the nucleus breaks down.
What happens during telophase of mitosis?: A nuclear membrane re-forms around each of the two sets of chromosomes, so the cell now has two nuclei.
What happens during cytokinesis?: The whole cell splits in two: the cytoplasm and cell membrane divide, forming two daughter cells.