BIO1913 Unit 3 Exam

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BIO1913 Unit 3 Exam
2011-10-27 12:55:52
BIO1913 Unit Exam Dr Cox

Based on lectures by Dr. Cox: Ch 8, 9, 20
Show Answers:

  1. What is the definition of Genome?
    All of the genetic information in a cell
  2. What organism does the smallest genome belong to and how many base pairs does it possess?
    • Mycoplasma gentatavium
    • 500,000 base pairs
  3. What are the 3 steps in Transcription?
    • 1. RNA Polymerase binds to promoter
    • 2. DNA unwinds
    • 3. RNA Polymerase reads and synthesizes RNA
  4. What is the significance of Genomics?
    Allows comparison of genomes to understand how they cause disease
  5. What is the purpose of constructing large genome databases?
    Allows the identification of unknown genes by comparing sequences
  6. True or False

    All gene functions are known when genes are sequenced?
    False. Not all gene functions are known even when genomes are sequenced.
  7. What is the significance of using bacteria to study genetics?
    They only have 1 chromosome/gene = immediate results
  8. What is the process of converting DNA (genes) to mRNA called?
  9. What is the process of synthesizing mRNA into protein called?
  10. What is the purpose of DNA ligase on the lagging strand of the replication fork?
    • Joins the discontinuous fragments of the lagging strand.
    • Reseals the plasmid
    • (know what it looks like in the graphic of the replication fork)