AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
DNA is the blueprint for making proteins. A change in DNA leads to different proteins being made, which ultimately results in an altered body design.
Source: Chapter 7, Section 7.1
The examiner expects you to establish the DNA → protein → body design chain in one line. The key idea from the passage is: DNA directs protein synthesis; changed DNA = different proteins = changed body design. Avoid writing more than one sentence for a 1-mark question.