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IB Biology SL B Form and Function Questions

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

Exam points

Explain how biological molecules are built, broken down and related to structure and function.
Explain how cell membranes, organelles and specialised cells support transport, compartmentalisation and cellular function.
Apply gas-exchange and transport principles to animal and plant systems using diagrams and data.
Explain how ecological niches, adaptations and organism interactions relate to environmental conditions.

Covered syllabus points

B1.1 Carbohydrates and lipids B1.2 Proteins B2.1 Membranes and membrane transport B2.2 Organelles and compartmentalization B2.3 Cell specialization B3.1 Gas exchange B3.2 Transport B4.1 Adaptation to environment B4.2 Ecological niches

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Study B Form and Function conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

[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.

[Maximum number: 1]

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

Figure for Question 2 — IB Biology SL

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

[Maximum number: 3]

The diagram shows the stages of the cell cycle.

Figure for Question 3 — IB Biology SL

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

[Maximum number: 1]

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

Figure for Question 4 — IB Biology SL

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

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