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Zorluk: OrtaCell Structure and Function

In eukaryotic cells, ribosomes bound to the rough endoplasmic reticulum primarily produce proteins destined for cellular secretion or membrane integration, whereas free ribosomes in the cytosol synthesize proteins that function inside the cytoplasm.

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True
The statement is true because eukaryotic translation is compartmentalized: bound ribosomes on the rough endoplasmic reticulum feed peptides into the endomembrane system for export or membrane integration, while free cytosolic ribosomes produce internal proteins such as metabolic enzymes and cytoskeletal elements.

Adım Adım Çözüm

1
Identify the distinct functional locations of ribosomes within a eukaryotic cell.
Ribosomes exist either freely suspended within the cytoplasm or attached to the membrane of the rough endoplasmic reticulum.
Ribosome location directly determines the trafficking pathway of the translated polypeptide.
2
Determine the protein destinations associated with rough endoplasmic reticulum-bound ribosomes.
Bound ribosomes translate proteins targeted for lysosomal delivery, incorporation into cellular membranes, or extracellular secretion via exocytosis.
Co-translational translocation feeds the emerging peptide directly into the endoplasmic reticulum lumen for packaging.
3
Determine the protein destinations associated with free cytosolic ribosomes.
Free ribosomes synthesize soluble proteins and enzymes that remain and operate within the intracellular fluid.
These proteins lack the signal sequences required for endoplasmic reticulum membrane docking.

Anahtar Kavram

Compartmentalization of protein synthesis between membrane-bound and free ribosomes
Tahmini Süre:45s
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Konular

Cell Structure and Function

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