1.9 Ribosomes

Ribosomes occur free in the cytoplasm and also attached to membranes of the ER. Ribosomes contain RNA. They temporarily bind to two other types of RNA molecules (messenger and transfer RNA) when amino acids are assembled to form proteins.

Figure 1.19. Same as previous Figure 1.18 but note the ribosomes attached to the rough endoplasmic reticulum.
Figure 1.19. Same as previous Figure 1.18 but note the ribosomes attached to the rough endoplasmic reticulum.

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