Everyday Science MCQs

Incomplete combustion produces carbon monoxide.
The colorless gas can accumulate dangerously in enclosed spaces.

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

Catalytic converters promote reactions that reduce carbon monoxide, hydrocarbons, and nitrogen oxides.
They require suitable operating temperature.

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

Biodegradable materials can be decomposed by bacteria and fungi.
Food scraps and paper are common examples.

Resistance evolves through mutations and selection.
Misuse and overuse of antibiotics accelerate its spread.

Composting uses microorganisms to break down organic matter.
The product can improve soil structure and fertility.

The cochlea contains hair cells that respond to sound vibrations.
These signals travel through the auditory nerve.

Plasmodium parasites cause malaria.
They are transmitted mainly by infected female Anopheles mosquitoes.

Leaks waste substantial water over time.
Repairing them is a simple and effective conservation measure.

Taste buds contain receptor cells for dissolved chemicals.
They contribute to sweet, sour, salty, bitter, and umami sensations.

Tuberculosis is a bacterial disease, often affecting the lungs.
It spreads through airborne droplets.