Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · Unit of Life: CellMedium · 45s
Who discovered the nucleus?
TopicUnit of Life: Cell
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
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Robert Brown discovered the cell nucleus in 1831.
Final Answer: Option B — Robert Brown