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Molecular Biology (BIO302)

Multiple Choice Questions (MCQs)

Objective Questions

  1. Organism like ________ have only one RNA polymerase but all ________ have at least three different ones i.e., Pol I, II, and III.

    1. eukaryote-prokayote
    2. bacteria-eukaryotes
    3. eukaryotic plants-eukaryotic animals
    4. eukaryotic plants-prokayote
  2. Usually Pol II promoters contain a TATA box ________ of the transcription start site.

    1. upstream
    2. downstream
  3. Plants have following polymerase except

    1. Pol IV
    2. Pol V
    3. Pol I to Pol V
    4. Pol 0
  4. In case of the bacterial enzyme bearing o70, this transition is often called

    1. Polymerization and isomerization
    2. Polymerization
    3. Isomerization
    4. None of the given
  5. The promoter for the ________ gene comprises two parts: the core element and the UCE (upstream control element).

    1. rRNA
    2. tRNA
    3. mRNA
    4. DNa
  6. The Elongating ________ is a processive machine that synthesizes and proofreads ________.

    1. helicase-RNA
    2. polymerase-RNA
    3. polymerase-DNA
    4. helicase-DNA
  7. Rho-independent terminators are also called ________ because they need no other factors to work.

    1. intrinsic terminators
    2. Extrinsic terminators
    3. Both Intrinsic and extrinsic
    4. None of the given
  8. TFIIB, is a single polypeptide chain that enters the ________ after TBP.

    1. preinitiation complex
    2. TFB complex
    3. TBP complex
    4. polymerase-DNA complex
  9. During DNA elongation, the enzyme polymerase adds one ________ at a time to the growing ________.

    1. nucleotide-DNA
    2. amino acid-DNA
    3. amino acid-RNA
    4. nucleotide-RNA
  10. The number of heptapeptide repeats (Tyr-Ser-Pro-Thr-Ser-Pro-Ser) in CTD correlates with the complexity of ________ of a cell.

    1. genome
    2. gene