BIOL 2421 Microbiology        Worksheet  (25 points) Name: _________________

Dr. Weis                               Microbial Genetics         CWID-4: _______________

1.      Regarding the Nucleic Acids: explain in detail the following by comparing what is similar and contrasting what is different between Eukaryotic and Prokaryotic nucleic acids with regards to: (3)

    1. Structure(s)
    2. Location(s)
    3. Number or type(s)
    4. Function(s)
    5. Base pairing rules

2.      Regarding DNA replication: (2.5)

    1. Define semi-conservative replication
    2. List the major enzymes involved in DNA replication and their purpose
    3. Explain the what is meant by leading and lagging strands
    4. Define and explain the purpose of methylation

3.      Define the following terms and explain how they are related: (2.5)

    1. Genotype
    2. Phenotype
    3. DNA code
    4. Codon
    5. Anticodon

4.      List and Explain all the events of Transcription (2)

5.      List and Explain all the events of Translation (2)

6.      Regarding Ribosomes (3)

    1. Describe the source, chemical composition, and function
    2. Compare and contrast eukaryotic/prokaryotic subunits
    3. Name and explain the three tRNA binding sites and their location
    4. Name four chemotherapeutic agents whose effects target the bacterial ribosomes and how each of these specifically affects ribosomal and cellular function.

7.      Regarding regulation of gene expression (4)

    1. Name all the parts of an operon and their function.
    2. Explain the difference between Positive and Negative Operon controls
    3. List the various "sub"-types of negative controlled Operons and explain in detail how they work

8.      Regarding Mutations: Name four different (4) types, their causes, effects, and clinical use. (2)

9.      For Genetic Recombination (2.5)

    1. Define horizontal vs. vertical transfer
    2. Explain the processes of conjugation, transformation, and transduction
    3. Generally explain what is meant by a transposon and their use/importance

10. Define plasmid and give three examples and explain their use/importance. (1.5)