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5 Written Questions

5 Matching Questions

  1. RNA (characteristic)
  2. Central dogma of molecular biology
  3. Stop codon
  4. Antiparallel
  5. DNA (characteristic)
  1. a DNA molecule is antiparallel -> Strands are oriented in opposite directions, strands differ at the ends 1) One strand oriented in the 5' to 3' direction. 2) The other strand is oriented in the 3' to 5' direction.
  2. b 1) Made up of deoxy-ribonucleotides 2) Nucleotides bond covalently between the 5'PO4 of one nucleotide and the 3'OH of another 3) Each sugar (deoxyribose) molecule is connected to a nitrogenous base 4) Chemical structure and joining of nucleotide subunits causes strands to differ at the ends 5) DNA occurs as double-stranded molecule 5) DNA molecule is antiparallel
  3. c Codon that terminates translation, signaling the end of the protein; there are 3 stop codons
  4. d Flow of information from DNA to RNA to protein
  5. e 1) RNA is made up of nucleotides -> Ribonucleotides 2) RNA contains nitrogenous bases -> Adenine, Guanine, Cytosine, Uracil (Uracil replaces thymine in RNA) 3) RNA usually exists as single stranded molecule 4) Portion of DNA acts of template for RNA synthesis -> Either strand of DNA can act as template 5) Three different functional groups of RNA mRNA, rRNA, tRNA

5 Multiple Choice Questions

  1. Messenger RNA -> type of RNA molecule that is translated during protein synthesis.
  2. 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
  3. Adenine
  4. 3'OH -> 1 strand of the DNA has a hydroxyl group attached to the number 3 carbon of the sugar. -> Termed the three prime (3') end
  5. Guanine

5 True/False Questions

  1. AnticodonSequence of 3 nucleotides in a tRNA molecule that is complementary to a particular codon in mRNA. The anticodon allows the tRNA to recognize and bind to the appropriate codon.

          

  2. TranscriptIs a fragment of RNA. Numerous transcripts can be produced from one chromosome

          

  3. Constitutive enzymesInducible enzymes -> Not regularly produced -> turned on in certain conditions -> Β-galactosidase

          

  4. Activators1) Control mechanism that turns on the transcription of a gene or set of genes 2) Inducers are substances that act to induce transcription -> Enzymes synthesized in the presence of inducers are called inducible enzymes

          

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

          

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