Task reminder: Follow the transcript as the audio plays. Click on words that differ from what you hear. Negative marking applies — incorrect selections lose marks.

1. Sample Text 1 — The Human Genome

The Human Genome Project, completed in 2003, mapped all of the genes in human DNA — approximately twenty-five thousand genes encoding the instructions for human biology. The project transformed medicine by enabling researchers to identify genetic mutations linked to inherited diseases and develop targeted therapies. However, understanding what most of the genome does — including the vast stretches of non-coding DNA — remains a major challenge.

Incorrect words — audio says: “sequenced” not “mapped”; “around” not “approximately”; “task” not “challenge”

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2. Sample Text 2 — Photovoltaic Technology

Solar photovoltaic panels convert sunlight directly into electricity through the photovoltaic effect. When photons from sunlight hit a semiconductor material such as silicon, they displace electrons, generating a flow of electric current. The efficiency of commercial solar panels has improved steadily over recent decades, while manufacturing costs have fallen dramatically, making solar power cost-competitive with fossil fuels in most markets.

Incorrect words — audio says: “light” not “sunlight” (second instance); “significantly” not “steadily”; “many” not “most”

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