The cards Question What is a unicellular organism? Tap to flip Answer An organism that consists of only one cell. Question What is a multicellular organism? Tap to flip Answer An organism made up of many cells. Question How do multicellular organisms grow? Tap to flip Answer By increasing the number of cells they have, which involves cell division. Question What is cell division? Tap to flip Answer The process by which cells replicate to produce two genetically identical cells. Question How are all new cells made? Tap to flip Answer An existing cell copies its genetic material and then divides in two. Question What is the cell cycle? Tap to flip Answer The process by which cells divide, made up of a specific set of phases. Question What are the two main phases of the cell cycle? Tap to flip Answer Interphase and mitosis. Question What is copied during interphase? Tap to flip Answer Each chromosome, and the sub-cellular structures. Question What is mitosis? Tap to flip Answer A type of cell division that produces genetically identical cells. Question Are a cell's chromosomes halved when it divides by mitosis? Tap to flip Answer No. They are copied first, so each of the two new cells has a copy of the same chromosomes. Question What is the nucleus? Tap to flip Answer A sub-cellular structure that contains the genetic material (DNA) and controls the cell's activities. Question What are chromosomes? Tap to flip Answer Tightly coiled strands of DNA that carry the genetic material. Question What shape is DNA? Tap to flip Answer A double helix: two strands wound together. Question What are nucleotides? Tap to flip Answer The individual subunits that make up DNA. Question What is a polymer? Tap to flip Answer A long chain of repeating subunits. Question How many different nucleotides make up DNA? Tap to flip Answer Four: A, C, G and T. Question In complementary base pairing, which bases pair together? Tap to flip Answer A pairs with T, and C pairs with G. Question How is the second strand of DNA arranged compared with the first? Tap to flip Answer It is inverted; the two strands are not the same way round. Question When is the DNA in chromosomes unwound and copied? Tap to flip Answer During interphase, before the cell divides by mitosis. Question What allows an exact copy of each 'unzipped' DNA strand to be made from free nucleotides? Tap to flip Answer Complementary base pairing. Question What is sexual reproduction? Tap to flip Answer Reproduction that combines the genetic material of two organisms to produce genetically different offspring. Question Which specialised cells does sexual reproduction require? Tap to flip Answer Gametes. Question What are gametes? Tap to flip Answer An organism's sex cells, which contain half the number of chromosomes. Question What type of cell division makes gametes from body cells? Tap to flip Answer Meiosis. Question How many rounds of cell division does meiosis include? Tap to flip Answer Two. Question What happens to the chromosomes during the interphase before meiosis? Tap to flip Answer They are copied. Question From each chromosome pair in the original body cell, how many chromosomes does a gamete get? Tap to flip Answer One. Question What is a haploid cell? Tap to flip Answer A cell with half the number of chromosomes. Question What cells does mitosis produce? Tap to flip Answer Two genetically identical diploid cells. Question What cells does meiosis produce? Tap to flip Answer Four genetically different haploid cells. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Cell division: mitosis and meiosis Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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