Civil Superior Services — Complete MCQ Bank
CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.
What is the powerhouse of the cell called?
Which part of the human body produces insulin?
Which radiation type is emitted during beta decay converting a neutron into a proton?
Which kidney process selectively returns useful substances like glucose back to the bloodstream?
Which vitamin deficiency causes pellagra characterised by dermatitis diarrhoea and dementia?
Which famous experiment proved that the Earth orbits the Sun rather than the Sun orbiting the Earth?
Which phenomenon explains why sound travels faster in warm air than in cold air?
Which common observation explains why sound seems louder when heard through walls compared to open air over long distances?
Which photoreceptor cells in the eye are responsible for vision in dim light and cannot distinguish colours?
Which photoreceptor cells in the eye are responsible for colour vision and function best in bright light?