Basic EDS MCQs (Set 4)
Everyday Science MCQs are part of PPSC Tests, FPSC Tests and all other competitive exams. You must prepare Basic EDS MCQs in order to qualify different competitive exams. Below is the Set 4 of most important Basic EDS MCQs.
1. The ability of the eye to see in the dark is due to the production of a purple pigment known as ______________.
B. Rhodopsin
Explanation:
Rhodopsin is the photopigment used by the rods and is the key to night vision. Intense light causes these pigments to decompose reducing sensitivity to dim light. Darkness causes the molecules to regenerate in a process called “dark adaptation” in which the eye adjusts to see in the low lighting conditions.
2. The main source of energy is _____________.
A. Sun
Explanation:
The most important sources of energy is the sun. The energy of the sun is the original source of most of the energy found on earth. We get solar heat energy from the sun, and sunlight can also be used to produce electricity from solar (photovoltaic) cells.
3. The major ingredient of leather is ______________.
B. Collagen
Explanation:
Leather is a durable and flexible material created by tanning animal rawhide and skins. The major ingredient of leather is Collagen.
4. The sound waves can not travel through ____________.
D. Vacuum
Explanation:
Sound wave is a mechanical wave. Therefore, it requires material medium for propagation. Hence, it cannot travel through vacuum.
5. The most sensitive layer of an eye is ______________.
D. Retina
Explanation:
The retina is the light-sensitive tissue at the back of the eye. The retina converts light into electrical impulses that are sent to the brain through the optic nerve.
