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5 Written questions

5 Matching questions

  1. Central dogma of molecular biology
  2. Phase variation
  3. Stop codon
  4. (G)
  5. rRNA
  1. a Codon that terminates translation, signaling the end of the protein; there are 3 stop codons
  2. b Flow of information from DNA to RNA to protein
  3. c Routine switching on and off of certain genes -> Altering expression allows portions of population to survive and multiply
  4. d Guanine
  5. e Ribosomal RNA -> type of RNA molecule present in ribosomes. rRNA builds the ribosomes

5 Multiple choice questions

  1. Transfer RNA -> type of RNA molecule that acts as a key, interpreting the genetic code; each tRNA molecule carries a specific amino acid. tRNA recognizes specific sequences of mRNA and transports the required amino acids to form a polypeptide chain
  2. 1) DNA replication 2) DNA expression (gene expression)
  3. Mechanisms to enhance survivability 1) Antigenic variation 2)
  4. Codon at which translation is initiated; it is typically the first AUG after a ribosome-binding site.
  5. Is a fragment of RNA. Numerous transcripts can be produced from one chromosome

5 True/False questions

  1. Gene Expression1) Control mechanism that inhibits gene expression and decreases the synthesis of enzymes 2) Repression is usually in response to the overabundance of an end product 2.1) Repression decreases the rate synthesis of enzymes leading to the formation of the particular end product 2.2) Regulatory proteins called repressors mediate repression -> Repressors block the ability of RNA polymerase to bind and initiate protein synthesis


  2. Repressible enzymes1) Routinely synthesized 2) Generally involved in biosynthesis


  3. C is pair withG -> C:G. G is bound to C by three hydrogen bond


  4. bidirectionalReplication is bidirectional -> Replication begins at specific starting point -> Proceeds in opposite directions -> Allows replication to proceed more quickly


  5. geneticsStudy of sequence of DNA


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