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IB Biology HL 2.3.1 Cell Differentiation Question Bank

Practise IB Biology HL 2.3.1 through exact HL questions on signalling gradients, embryonic gene expression and biochemical evidence of differentiation.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Analyse biochemical evidence such as protein or mRNA production to evaluate cell differentiation.
  • Explain how signalling gradients activate different genes in embryonic cells.
  • Use gene-expression evidence to connect a differentiated cell type with its specialised function.

B2.3.1—Differentiation after fertilization question 1

[Maximum number: 1]

Which method provides biochemical evidence that cells have begun to differentiate?

A

Observation with a light microscope

B

Observation with an electron microscope

C

Examination of the DNA sequence

D

Analysis of the proteins

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