In the name of ALLAH, the most beneficient, the most merciful

Molecular Biology (BIO302)

Multiple Choice Questions (MCQs)

Objective Questions

  1. TFIIB, is a single polypeptide chain that enters the ________ after TBP.

    1. preinitiation complex
    2. TFB complex
    3. TBP complex
    4. polymerase-DNA complex
  2. 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
  3. The Elongating ________ is a processive machine that synthesizes and proofreads ________.

    1. helicase-RNA
    2. polymerase-RNA
    3. polymerase-DNA
    4. helicase-DNA
  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. 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
  6. Usually Pol II promoters contain a TATA box ________ of the transcription start site.

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

    1. Pol IV
    2. Pol V
    3. Pol I to Pol V
    4. Pol 0
  8. 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
  9. 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
  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