Table of contents

1. Overview of Cell Biology2h 49m
2. Chemical Components of Cells1h 14m
3. Energy1h 33m
4. DNA, Chromosomes, and Genomes2h 31m
5. DNA to RNA to Protein2h 31m
6. Proteins1h 36m
7. Gene Expression1h 42m
8. Membrane Structure1h 4m
- The Lipid Bilayer
  38m
- Membrane Proteins
  25m
9. Transport Across Membranes1h 52m
10. Anerobic Respiration1h 5m
11. Aerobic Respiration1h 11m
12. Photosynthesis52m
13. Intracellular Protein Transport2h 18m
14. Cell Signaling1h 28m
15. Cytoskeleton and Cell Movement1h 39m
16. Cell Division3h 5m
17. Meiosis and Sexual Reproduction50m
18. Cell Junctions and Tissues48m
19. Stem Cells13m
- Stem Cells
  13m
20. Cancer44m
21. The Immune System1h 6m
22. Techniques in Cell Biology1h 41m

1. Overview of Cell Biology

Overview of Tissue Structures

Cell Biology

1. Overview of Cell Biology

Overview of Tissue Structures

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Multiple Choice

Which of the following actions occurs commonly at a nuclear pore complex?

Synthesis of ribosomal RNA

Transport of mRNA from the nucleus to the cytoplasm

Attachment of ribosomes to the endoplasmic reticulum

Replication of mitochondrial DNA

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Verified step by step guidance

Understand the function of the nuclear pore complex: The nuclear pore complex (NPC) is a large protein structure embedded in the nuclear envelope. Its primary role is to regulate the transport of molecules between the nucleus and the cytoplasm, ensuring selective exchange of RNA, proteins, and other macromolecules.

Eliminate options that do not involve the nuclear pore complex: For example, 'Synthesis of ribosomal RNA' occurs in the nucleolus, not at the nuclear pore complex. Similarly, 'Replication of mitochondrial DNA' occurs in mitochondria, which are separate organelles and not related to the nuclear pore complex.

Consider the role of the nuclear pore complex in mRNA transport: After transcription, mRNA is processed and exported from the nucleus to the cytoplasm through the nuclear pore complex. This is a key function of the NPC, as it facilitates gene expression by allowing mRNA to reach ribosomes in the cytoplasm for translation.

Evaluate the option 'Attachment of ribosomes to the endoplasmic reticulum': This process is unrelated to the nuclear pore complex. Ribosomes attach to the rough endoplasmic reticulum during translation, which occurs in the cytoplasm, not at the nuclear envelope.

Conclude that the correct action commonly occurring at the nuclear pore complex is 'Transport of mRNA from the nucleus to the cytoplasm,' as this aligns with the primary function of the NPC in cellular transport.