IB Biology HL B2.2.7 Hl Free Ribosomes Vs Rough Er Questions

Explore how free ribosomes make cytoplasmic proteins while rough-ER-bound ribosomes make secreted, membrane and lysosomal proteins in IB Biology HL B2.2.7.

Exam points

Explain that free ribosomes synthesize proteins retained and used mainly in the cytoplasm.
Explain that rough-ER-bound ribosomes synthesize proteins for secretion, membranes or lysosomes.
Use polysomes, rough ER and protein-destination evidence to identify the ribosome type involved.

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Study B2.2.7 (HL)—Free ribosomes vs. rough ER conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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Outline what happens to the proteins produced by free and bound ribosomes.

Free ribosomes:

Bound ribosomes:

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IB Biology HL B2.2.7 Hl Free Ribosomes Vs Rough Er Questions question 1