FPSC MCQs

Renewable resources are naturally replaced relatively quickly.
Examples include sunlight, wind, and flowing water.

Photovoltaic materials release charge carriers when illuminated.
The device generates direct electric current.

Hydropower turbines are driven by flowing or falling water.
Generators convert the turbine's motion into electricity.

Earth's internal heat warms rocks and underground water.
It can provide heating or generate electricity.

Tectonic stress builds in Earth's crust.
When rocks slip, seismic waves spread from the rupture.

The thyroid incorporates iodine into its hormones.
Deficiency may cause goiter and impaired development.

Coal, oil, and gas release stored carbon when burned.
The resulting carbon dioxide contributes to climate change.

Immunity uses physical barriers, cells, and molecules to defend the body.
It includes innate and adaptive responses.

Methane absorbs infrared radiation efficiently.
It is produced by anaerobic decomposition and livestock digestion.

Vaccines expose the immune system to safe antigenic material.
This creates memory for faster future protection.

These pollutants form sulfuric and nitric acids in air.
Acid deposition can harm lakes, soils, buildings, and forests.

Antibiotics act on features such as bacterial walls or ribosomes.
Viruses use host-cell machinery and lack those targets.