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Initiation of Translation Proteins Quiz
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Initiation of Translation Proteins Quiz

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Questions and Answers

What distinguishes the charged initiator tRNA, Met-tRNAi, in eukaryotes from other Met-tRNAs?

  • It cannot bind to the 5′ cap of mRNA.
  • It does not require the 60S subunit for translation initiation.
  • It binds fMet at the Shine-Dalgarno sequence.
  • It can bind IFs. (correct)
  • What role does the cap-binding protein (CBP) play in eukaryotic translation initiation?

  • Directly binds to the 5′ cap of mRNA.
  • Releases dissociated tRNAs from the E site.
  • Assists in the deposition of charged tRNA at the Shine-Dalgarno sequence.
  • Facilitates the movement of the ribosome to the AUG start codon. (correct)
  • What is the significance of the 7-methylguanosine cap at the 5′ end of mRNA in eukaryotic translation initiation?

  • Indicates the first AUG start codon.
  • Helps in tracking along the mRNA from 5′ to 3′ direction. (correct)
  • It directly binds to IFs for translation initiation.
  • Acts as a recognition site for charged initiator tRNA.
  • According to Kozak’s rules, what does the consensus sequence 5′-gccRccAUGG-3′ around the AUG start codon indicate?

    <p>Efficiency of translation initiation.</p> Signup and view all the answers

    How does Met-tRNAi in eukaryotes differ from other Met-tRNAs in terms of binding during translation initiation?

    <p>Binds directly to the P site without entering the A site.</p> Signup and view all the answers

    During which phase of meiosis do homologous chromosomes pair up, exchange genetic information through crossing over, and condense?

    <p>Prophase I</p> Signup and view all the answers

    What is the main function of cyclins and cyclin-dependent kinases (CDKs) in cell cycle regulation?

    <p>Driving the cell cycle progression</p> Signup and view all the answers

    Which stage of meiosis involves the separation of homologous chromosome pairs into two groups, one maternal and one paternal?

    <p>Anaphase I</p> Signup and view all the answers

    What is the primary goal of the G1 (Gap 1) phase in the cell cycle?

    <p>Ensuring proper growth</p> Signup and view all the answers

    Which phase of the cell cycle involves DNA synthesis and duplication of chromosomes?

    <p>S Phase</p> Signup and view all the answers

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