IB skill practice

Analyse nucleic acids, chromosomes, and gene regulation

Paper 1, Paper 2 5 marks Difficulty 5

Link chromatin packing to expression

Chromosome evidence in a Auckland molecular biology class shows tightly packed chromatin near a gene and a very low transcript count. Explain the relationship. Use the diagram labels, data values, or inheritance pattern before writing the answer. Enter the answer and choose the interpretation that best matches the HL Biology evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.