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5 Written questions

5 Matching questions

  1. Constitutive enzymes
  2. (T)
  3. Transcription
  4. Activators
  5. Melting or denaturing
  1. a Thymine
  2. b 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
  3. c Process of synthesizing RNA from DNA template 1) mRNA carries the coded information from DNA to the ribosome, which is the site of protein synthesis 2) mRNA also plays an important role in translation 3) During transcription the enzyme, RNA polymerase, synthesizes a complementary strand of mRNA from a portion of unwound DNA
  4. d Is when you separate the 2 strands of a DNA
  5. e Constantly synthesized -> Enzymes of glycolysis

5 Multiple choice questions

  1. 1) Strands are complementary to each other -> Due to the specific base pairing of bases -> A:T and C:G 2) Strands are held together with hydrogen bonds -> A is bound to T by two hydrogen bonds and G is bound to C by three hydrogen bond
  2. Codon at which translation is initiated; it is typically the first AUG after a ribosome-binding site.
  3. RNA is deciphered to synthesize protein 1) Two more RNA molecules become involved in translation 1.1) Ribosomal RNA (rRNA) 1.2) Transfer RNA (tRNA) 2) The language of mRNA is in the form of codons 3) There are 64 codons that make up the "alphabet" of proteins 4) Codons contained in mRNA are read into proteins through translation 4.1) The site of translation is the ribosome 4.2) In response to each codon, tRNA brings the appropriate amino acid to the site of translation 4.3) Each codon has an anticodon -> The anticodon is complementary sequence to the codon
  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. 1) 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 True/False questions

  1. RNA polymeraseGrouping of a stretch of nucleotides into sequential triplets; an mRNA molecule has 3 reading frames, but only 1 is typically used in translation.


  2. Antigenic variationAlteration in characteristics of certain surface proteins -> Example: Neisseria gonorrhoeae hides from host immunity by changing numerous surface proteins


  3. (G)Thymine


  4. mRNATransfer 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


  5. geneticsStudy of transfer of genes