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Nucleic acids

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  • Which sugar is found in all RNA molecules?
    Ribose
  • What is different about a pair a homologous chromosomes?
    The alleles they carry
  • What does universal mean?
    Each triplet codes for the same amino acid in all organisms
  • What is a codon?
    A sequence of 3 bases
  • What does degenerate mean?
    Each amino acid can be coded for by more than one triplet
  • State 3 features of tRNA
    Clover-leaf shape, Amino acid attachment point, anticodon, hydrogen bonds
  • Which nucleic acid is the most stable?
    DNA
  • What is the combination of DNA and a histone called?
    Nucleosome
  • What does non-overlapping mean?
    Each base sequence is read only once
  • What shape is mRNA?
    Single helix
  • Which type of RNA is found in the nucleus?
    mRNA / pre mRNA
  • What are coding sequences called?
    Exons
  • What is an anticodon
    A sequence of 3 bases on a tRNA molecule
  • Which amino acid is coded for first in all polypeptides
    Methionine
  • Which type of RNA has a fixed length?
    tRNA
  • What is an allele?
    Different form of the same gene
  • What is a gene
    A bases sequences that codes for a polypeptide
  • What is an intron?
    Non coding sequence
  • State one difference between prokaroytic and eukaryotic DNA
    Histones, length, size
  • How is the shape of tRNA described?
    Clover leaf
  • How many nucleotides make up a tRNA molecule
    80
  • How does the stability of mRNA compare to tRNA
    mRNA less stable
  • What is the same about a pair of homologous chromosomes
    The genes they carry
  • Which nucleic acid is the largest?
    DNA
  • What is the proteome of a cell?
    All the proteins produced by the genome
  • What is a locus
    A particular location on a DNA molecule
  • Which protein is DNA coiled around?
    Histone
  • What is the genome of an organism?
    All the genes in the cell