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Question
The first genetic material could be ______.
Options
RNA
DNA
protein
lipid
MCQ
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Solution
The first genetic material could be RNA.
Explanation:
According to the “RNA World” hypothesis, RNA is widely believed to be the first genetic material because it is a versatile molecule that can perform two critical tasks. Unlike DNA, which only stores information, or proteins, which only act as catalysts, RNA can both store genetic code and act as a biological catalyst (called a ribozyme) to speed up chemical reactions. Early life forms likely used RNA for both roles, and only later did the more stable DNA evolve for long-term storage, while proteins took over the role of specialised machinery.
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