inheritance, variation and evolution

Cards (221)

  • What does DNA stand for?
    Deoxyribonucleic acid
  • What is the role of DNA in a cell?
    It contains coded information for organism functions
  • What determines inherited characteristics in an organism?
    What is in the DNA
  • Where is DNA found in cells?
    In the nucleus
  • How do chromosomes normally appear?
    In pairs
  • What is DNA classified as?
    A polymer
  • What is the structure of DNA?
    Two strands coiled in a double helix
  • What is a gene?
    A small section of DNA on a chromosome
  • What does each gene code for?
    A particular sequence of amino acids
  • How many amino acids are used to make proteins?
    20
  • What determines the order of amino acids in a protein?
    The order of bases in a gene
  • What is the function of DNA in protein production?
    It determines what proteins the cell produces
  • What is a genome?
    The entire set of genetic material in an organism
  • Why is understanding the human genome important?
    It helps identify genes linked to diseases
  • How can scientists trace human migration using genomes?
    By investigating differences in genomes
  • What are nucleotides?
    Repeating units that make up DNA strands
  • What three components make up a nucleotide?
    Sugar, phosphate, and base
  • What forms the backbone of DNA strands?
    Sugar and phosphate molecules
  • What is complementary base pairing?
    A pairs with T, C pairs with G
  • How does the order of bases affect proteins?
    It decides the order of amino acids
  • How many bases code for each amino acid?
    A sequence of three bases
  • What happens to amino acids after they are coded?
    They are joined to make proteins
  • What are non-coding parts of DNA responsible for?
    Switching genes on and off
  • Where are proteins made in the cell?
    In the ribosomes
  • What do carrier molecules do during protein synthesis?
    Bring correct amino acids to ribosomes
  • How does mRNA function in protein synthesis?
    It carries the code from DNA to ribosomes
  • What happens to a chain of amino acids after assembly?
    It folds into a unique shape
  • What is the function of enzymes?
    Speed up chemical reactions
  • What is an example of a hormone?
    Insulin
  • What are structural proteins?
    Physically strong proteins like collagen
  • What is a mutation?
    A random change in an organism's DNA
  • How can mutations occur?
    Spontaneously or due to exposure to substances
  • What is a genetic variant?
    A different form of a gene
  • How do mutations affect proteins?
    They can change the protein's structure and function
  • What happens if an enzyme's active site shape changes?
    The substrate may no longer bind
  • What can happen to structural proteins like collagen due to mutations?
    They could lose strength and function
  • What are insertions in DNA mutations?
    New bases inserted into the sequence
  • How do insertions affect the reading of DNA?
    They change how groups of three bases are read
  • What are deletions in DNA mutations?
    Random bases deleted from the sequence
  • How do deletions affect the reading of DNA?
    They change how the base sequence is read