cell division exam papers

• biological explanation for, meiosis halves the number of chromosomes in cells?

  to produce gametes for sexual reproduction
• describe two events that occur during prophase?


  chromatin condenses, spindle forms
• describe one event that happens during metaphase?

  Chromosomes align at the equator of the cell
• how does cell division occur in a plant cell?

  cell plate forms
• how does cell division occur in an animal cell ?

  cleavage furrow forms
• outline a function of mitosis in humans?

  growth / repair
• give examples of a human cell not produced by mitosis?

  sperm, egg,gamete
• give a property anaphase stage diagram has?

  chromosomes pulled apart
• true or false- spindle fibres cotract during metaphase of mitosis?

  false
• state two ways in which meiosis differs from mitosis?

  four new cells produced, variation
• define cancer?

  the uncontrolled growth of cells caused by carcinogens
• mitosis definition ?

  when a cell divides and produces 2 new cells that are genetically identical to the original cell
• diploid?

  two sets of chromosomes
• function of mitosis in single celled organisms?

  asexual reproduction
• function of mitosis in multi-celled organisms?

  growth and repair
• what term is used to describe the long stage of the cell cycle when cell division is not occuring?

  interphase
• name two types of biomolecules that are produced in the cell during this stage of the cell cycle?

  protein, carbohydrates, nucleic acid
• name an organelle that is replucated at this stage of the cell cycle?

  mitocondrian/chloroplast/ribosomes/centriole
• give two other changes which will have occured in the cell by the end of this stage of the cell?

  condensed chromosomes, spindle formation
• suggest why mature human red blood cells do not undergo cell division?

  no nucleus