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IB Biology SL B Form & Function Question Bank

Practise IB Biology SL B Form and Function through questions on biological structures, cells, transport, physiology and body systems.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Covered syllabus points

B1.1 Carbohydrates and lipidsB1.2 ProteinsB2.1 Membranes and membrane transportB2.2 Organelles and compartmentalizationB2.3 Cell specializationB3.1 Gas exchangeB3.2 TransportB4.1 Adaptation to environmentB4.2 Ecological niches

B Form and Function question 1

[Maximum number: 4]

Carbon is an essential element for life on Earth and must be distributed and recycled within ecosystems.

Outline the chemical properties of carbon that allow it to form diverse compounds.

B Form and Function question 2

[Maximum number: 1]

The diagram shows the molecular structure of the amino acid leucine.

Figure for Question B Form and Function question 2 — IB Biology SL

Draw a circle on the diagram to enclose the carboxyl group.

B Form and Function question 3

[Maximum number: 3]

The diagram shows the stages of the cell cycle.

Figure for Question B Form and Function question 3 — IB Biology SL

Explain the properties of phospholipids that allow bilayers to form in cell membranes.

B Form and Function question 4

[Maximum number: 1]

The following electron micrograph has a magnification of ×44000\times 44000.

Figure for Question B Form and Function question 4 — IB Biology SL

State the name of the main organelle in the electron micrograph.

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