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Nucleus Knowledge-Based Practice

Biology · Cell Structure & Function · Biology · Organelles

5 Biology practice questions on Nucleus. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which structure encloses the eukaryotic nucleus, consisting of two concentric lipid bilayer membranes whose outer layer is directly continuous with the rough endoplasmic reticulum?

    • A) Nuclear envelope
    • B) Nuclear lamina
    • C) Nucleoplasm
    • D) Nucleolus
  2. 2.

    In the interphase eukaryotic nucleus, which form of chromatin is loosely packed and accessible for active gene transcription?

    • A) Heterochromatin
    • B) Kinetochore
    • C) Euchromatin
    • D) Telomere
  3. 3.

    Which multi-protein structure perforates both membranes of the nuclear envelope to regulate the selective, bidirectional transport of macromolecules between the nucleus and the cytoplasm?

    • A) Desmosome
    • B) Plasmodesma
    • C) Gap junction
    • D) Nuclear pore complex
  4. 4.

    Which fibrous meshwork of intermediate filaments lines the inner nuclear membrane to provide mechanical support to the nucleus and assist in organizing chromatin?

    • A) Nuclear lamina
    • B) Nuclear pore complex
    • C) Kinetochore
    • D) Microtubule organizing center
  5. 5.

    Which subnuclear structure is primarily responsible for the transcription of ribosomal RNA (rRNA) and the assembly of ribosomal subunits?

    • A) Nuclear envelope
    • B) Nucleolus
    • C) Nuclear lamina
    • D) Chromatin

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