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Popular MCQ Practice
Try these sample questions, check your answers and strengthen your concepts.
Which physical quantity is measured in joules?
The joule (J) is the SI unit of energy and work. One joule equals one newton-metre.
Which organelle is primarily responsible for ATP production in eukaryotic cells?
Mitochondria generate most ATP during aerobic cellular respiration, mainly through oxidative phosphorylation.
Which gas is most abundant in Earth’s atmosphere?
Nitrogen makes up approximately 78% of Earth’s dry atmosphere by volume.
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