Cell Biology Quiz Week 6
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Questions and Answers

The ER signal sequence on a protein will bond to...

  • mRNA
  • Translocon
  • Ribosome
  • SRP (correct)

    • mRNA that encodes for a peptide neurotransmitter exits the nucleus. That mRNA will immediately...

  • Bind to the ER-bound ribosome
  • Bind to a translocon in the ER membrane
  • Bind to a cytoplasmic ribosome (correct)
  • Be transported directly to the plasma membrane

    • Proteasomes...

  • are located in the cytosol
  • can be considered molecular machines
  • digest ubiquitinated proteins
  • all of the above (correct)

    • Which statement(s) are true?

    <p>Both A and C (D)</p> Signup and view all the answers

    Which of the following does NOT have peptide bonds?

    <p>GTP (B)</p> Signup and view all the answers

    The activity of kinases will cause the nuclear lamina to...

    <p>fall apart (A)</p> Signup and view all the answers

    Which of the following is made of phospholipids?

    <p>Nuclear envelope (A)</p> Signup and view all the answers

    During the synthesis of the core oligosaccharide, the sugar chain is assembled on the cytoplasmic leaflet of the ER membrane, and then it is later moved to the lumen side by a flippase.

    <p>True (A)</p> Signup and view all the answers

    Cytoplasmic ribosomes and ER-bound ribosomes are structurally identical and interchangeable.

    <p>True (A)</p> Signup and view all the answers

    Ribosomal subunits are composed of rRNA that was spliced in the nucleolus, plus proteins that were synthesized in the cytoplasm and imported into the nucleus through a nuclear pore complex.

    <p>True (A)</p> Signup and view all the answers

    Ribosomes are the site of hydrolysis reactions, forming peptide bonds between amino acids.

    <p>False (B)</p> Signup and view all the answers

    DNA has a negative charge.

    <p>True (A)</p> Signup and view all the answers

    RCC1 is a GAP that resides in the nucleus. RCC1 facilitates the hydrolysis of RAN-GTP to RAN-GDP.

    <p>False (B)</p> Signup and view all the answers

    The nuclear basket extends into the nucleoplasm.

    <p>True (A)</p> Signup and view all the answers

    Which statement is true?

    <p>Nucleoli are irregularly shaped structures within the nucleus that process rRNA (C)</p> Signup and view all the answers

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