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5 Written questions

5 Matching questions

  1. Melting or denaturing
  2. For cells to multiply
  3. Principles of regulation
  4. RNA (characteristic)
  5. Nucleotides
  1. a 1) DNA replication 2) DNA expression (gene expression)
  2. b Is when you separate the 2 strands of a DNA
  3. c Includes 1) Phosphate group 2) 5 carbon sugar -> Deoxyribose 3) Nucleotides bond covalently between the 5'PO4 of one nucleotide and the 3'OH of another -> Joining of nucleotides creates an alternating sugar-phosphate backbone
  4. d 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. e 1) Not all genes subjected to regulation 2) Enzymes can be classified according to characteristics of regulation 2.1) Constitutive enzymes 2.2) Inducible enzymes 2.3) Repressible enzymes

5 Multiple choice questions

  1. 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. 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
  3. Codon that terminates translation, signaling the end of the protein; there are 3 stop codons
  4. Mechanisms to enhance survivability 1) Antigenic variation 2)
  5. 1) 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 True/False questions

  1. (T)Thymine

          

  2. (A)Cytosine

          

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

          

  4. genomic1) Complete set of genetic information referred 2) Genome of all cells is composed of DNA ->Some viruses have RNA genome 2) Functional unit of genome is the gene 3) Gene codes for gene product -> Gene product is most commonly protein

          

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