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DNA

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  • DNA strands fold into paired packages called ...
    chromosomes
  • What is TRANSCRIPTION?
    This is when the cell makes a copy of the DNA. (called RNA)
  • What did Rosalind Franklin do?
    She obtained a crystal of DNA molecules and analysed it using Xrays.
  • What is Down's syndrom (trisomy 21) caused by?
    An extra chromosome (in the 21st set)
  • The base ADENINE can only pair with...
    thymine
  • What are the types of bases in a nucleotide?
    adenine, thymine, cytosine and guanine.
  • Who are James Watson and Francis Crick?
    the scientist who came up with a double helix DNA model
  • What does DNA stand for?
    Deoxyribonucleic Acid
  • What is TRANSLATION?
    This is when the RNA is converted into a sequence of amino acids that makes up the protein.
  • The base CYTOSINE can only pair with...
    guanine
  • What three things are nucleotides composed of?
    a phosphate group, a sugar and a nitrogen base.
  • What is RNA (mRNA)?
    partial copies of DNA
  • What's the function of RIBOSOMES?
    they build protein, read DNA codes (3 letters at a time), stick amino acids together to form new chains
  • An important property of DNA is that it can ___
    replicate
  • Where is DNA found in a cell?
    In the NUCLEUS of every eukaryotic cell.
  • What is DNA (how can we define it?)
    an instruction manual for how to build life / a molecular blueprint for a living thing
  • What are NUCLEOTIDES?
    Information stored in DNA as a code made up of four types of molecules
  • What is the structure of DNA filaments called?
    a double helix structure
  • Which chromosomes do males have in there cells? (XX or XY)
    XY
  • Nucleotides assemble in chains through a ____ backbone.
    sugar-phosphate
  • What determines the information to build and maintain an organism?
    the order of the bases in nucleotides
  • How many PAIRS of chromosomes do humans have?
    23