Top 100 General Science Questions and Answers

Correct Answer : D
Explanation :

The term "Rh factor" is derived from the Rhesus monkey, in which the protein was first discovered. The Rh factor is a protein that can be present on the surface of red blood cells, and it is named after the Rhesus monkey because the protein was initially identified in Rhesus monkey blood during scientific experiments. The Rh factor is an important component in blood typing and can be either Rh-positive (presence of the protein) or Rh-negative (absence of the protein) in humans.

Correct Answer : C
Explanation :
Actually, the locomotor part of a hydra is not its tentacles. Hydras move by a remarkable way called "looping." They attach one end of their body to a surface and then release the other end, allowing it to move and attach again. This looping movement is facilitated by the contraction and expansion of the body, rather than the use of tentacles. Tentacles are specialized structures primarily used for feeding and defense in hydras.

Correct Answer : C
Explanation :

If the image formed in a mirror is always erect (upright) and equal in size to the object, the mirror is a flat mirror (plane mirror). Flat mirrors reflect light without distorting the image, producing an erect image that is the same size as the object and reversed from left to right.

Correct Answer : C

Correct Answer : D
Explanation :

The refractive index of diamond is approximately 2.42. Diamond has a very high refractive index, which means it bends light at a significant angle when it enters the diamond, contributing to its sparkling brilliance.

Correct Answer : C
Explanation :
Accommodation in the eye lens is the process of adjusting its shape to focus on objects at different distances. This adjustment is controlled by the ciliary muscles. When focusing on nearby objects, these muscles contract, thickening the lens. For distant objects, the muscles relax, flattening the lens, ensuring clear vision at varying distances.

Correct Answer : D

Correct Answer : D
Explanation :
The yellow color of human urine is primarily due to a pigment called urochrome. Urochrome is a waste product resulting from the breakdown of hemoglobin, a protein in red blood cells. The varying shades of yellow in urine can be influenced by factors such as hydration levels, diet, and certain medications, but urochrome is the main pigment responsible for the typical yellow color of urine.

Correct Answer : C
Explanation :

the uppermost layer of the skin is called the epidermis. It is the outermost layer of the skin and provides a protective barrier against environmental factors, pathogens, and moisture loss. The epidermis also contains cells responsible for producing melanin, the pigment that gives skin its color, and it constantly renews itself through a process called cell turnover.

Correct Answer : C
Explanation :

The masseter muscle, which is one of the muscles used for chewing and is located in the jaw, is often considered one of the most powerful muscles in the human body in terms of its force and capability. However, the term "most powerful" can be interpreted in different ways, considering factors like strength, endurance, or speed. Different muscles might be considered the most powerful depending on the specific criteria used.