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IB Biology
A Unity and Diversity
A1.1 Water
A1.2 Nucleic acids
A2.1 Origins of cells
A2.2 Cell structure
A3.1 Diversity of organisms
A4.1 Evolution and speciation
A4.2 Conservation of biodiversity
B Form and Function
B1.1 Carbohydrates and lipids
B1.2 Proteins
B2.1 Membranes and membrane transport
B2.2 Organelles and compartmentalisation
B2.3 Cell specialisation
B3.1 Gas exchange
B3.2 Transport
B4.1 Adaptation to environment

Selected syllabus point

A2.2 Cell structure

[1 mark]

Which organelle modifies and packages proteins for secretion?

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IB Biology

A1.2 Nucleic acids

Active syllabus
68%

Secure across lessons, practice and recent paper attempts.

24
questions tried
6
weak points
+11%
paper marks
Next recommended step
Review base pairing, then practice with a focused Paper 2 set.
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I do not just need the answer. I need to understand why the mark scheme wants it.

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