Study

Bacterial Genetics

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  • Why are genes regulated?
    To conserve energy, respond to the environment.
  • What codon is the "start" codon?
    AUG/Methionine
  • What is a promoter?
    The site where RNA Polymerase binds, signaling the beginning of transcription.
  • What are the components of a nucleotide?
    A phosphate, a pentose and a nitrogenous base
  • I have genes for both green eyes and blue eyes. Is this my genotype or my phenotype?
    Genotype
  • If B. cereus is 30% cytosine, what percentage of it is thymine?
    20%
  • What are some characteristics of RNA?
    Single stranded. Ribose as the pentose. Uracil is unique to RNA.
  • What is the function of single strand binding proteins?
    Maintain the integrity of the replication fork. Holds it open
  • These are the nitrogenous bases found within DNA.
    Adenine, Guanine, Cytosine and Thymine
  • This kind of bond forms the backbone of both DNA and RNA
    Phosphodiester bonds.
  • Describe the central dogma theory.
    The flow of genetic information: DNA -> RNA -> Protein.
  • What is a Gene?
    A specific sequence of nucleotides that code for RNA molecules or proteins.
  • What are some characteristics of DNA?
    Double stranded. Deoxyribose as the pentose. Thymine is unique to DNA.
  • This nitrogenous base is found only in RNA
    Uracil
  • This enzyme divides double stranded DNA during replication
    Helicase
  • This enzyme forms a phosphodiester bond between new nucleotides.
    Ligase
  • What is a gene locus?
    The specific location of a gene on a chromosome.
  • If B. cereus has 27% Adenine in its DNA, what percent is composed of uracil?
    There's no uracil in DNA ;)
  • What is meant by "semiconservative" DNA replication?
    Half of the new DNA strand is "conserved" from the parent strand, and the other half is newly replicated.
  • These contain genetic information that isn't necessary for life, but may contain beneficial information, like drug resistance.
    Plasmids
  • What is a genome?
    The complete genetic content of an organism