10 Questions
Which of the following organelles is responsible for protein synthesis?
Ribosome
Which mechanism is responsible for the transport of proteins from the cytosol to the endoplasmic reticulum (ER)?
Transmembrane Transport
Which organelle is responsible for the modification and sorting of proteins?
Golgi Complex
Which organelle is responsible for the digestion of intracellular materials?
Lysosome
Which mechanism is responsible for the transport of proteins and RNA from the nucleus to the cytosol and vice versa?
Gated Transport
What is the primary significance of the 'topologically equivalent' compartments in the context of vesicular transport?
Proteins can be directly sorted from one compartment to another without crossing a membrane.
What is the primary function of the nuclear pore complex in regulating the movement of molecules across the nuclear membrane?
The nuclear pore complex contains aqueous passages that allow for the passive diffusion of molecules up to 60,000 Daltons in size.
Which of the following is the best explanation for the directional transport of molecules across the nuclear membrane, as described by the Ran-GTPase cycle?
The location of Ran-GAP and Ran-GEF outside and inside the nucleus, respectively, creates an asymmetric distribution of Ran-GTP and Ran-GDP that drives directional transport.
Which of the following pieces of evidence best supports the endosymbiotic theory of mitochondrial origin?
The inner membrane of mitochondria is structurally and functionally similar to the plasma membrane of bacteria.
Why is it significant that mitochondria do not synthesize most of their own proteins, despite having their own ribosomes?
The cell maintains control over the production of mitochondrial proteins, ensuring the mitochondria remain dependent on the eukaryotic host cell.
Test your knowledge on the basic functions of organelles such as the nucleus, ribosomes, cytoplasm, endoplasmic reticulum, Golgi complex, and endosomes. No diagrams to label, just facts to recall.
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