The largest portion of the brain is:
a) Fore brain
b) Hind brain
c) Mid brain
d) The spinal cord
Explanation: The largest portion of the brain is the forebrain. The forebrain is the most developed and prominent region of the brain, consisting of structures such as the cerebral cortex, thalamus, hypothalamus, and basal ganglia. It plays a crucial role in higher cognitive functions, sensory processing, voluntary movement, and various other complex brain functions.
Which instrument is used to see distant objects?
a) Aluminum
b) Periscope
c) Telescope
d) Microscope
The speed of light in vacuum is____
a) 3 x 106
b) 3 x 108
c) 3 x 1010
d) 3 x 1012
Which among the following is the most important role played by Ribosome in the cells?
a) Synthesis of RNA
b) synthesis of DNA
c) Synthesis of Protein
d) Metabolism of Carbohydrates
Explanation: The most important role played by ribosomes in cells is the synthesis of proteins. Ribosomes are cellular structures composed of RNA and proteins. They are responsible for decoding the information contained in messenger RNA (mRNA) and catalyzing the process of protein synthesis. Ribosomes link amino acids together in a specific order based on the instructions provided by the mRNA, thus enabling the production of proteins, which are essential for various cellular functions.
Water covers___% of the earth’s surface.
a) 60
b) 70
c) 20
d) 100
Explanation: Water covers approximately 70% of the Earth's surface. This includes the oceans, seas, lakes, rivers, and other bodies of water found on our planet.
Contaminated water can be purified by:
a) Agriculture
b) Adding salt
c) Adding detergents
d) Distillation
Explanation: Contaminated water can be purified through the process of distillation. Distillation involves heating the water to create steam and then collecting the condensed steam, which is free from contaminants. This process helps remove impurities, such as bacteria, viruses, minerals, and pollutants, leaving behind purified water. It is a commonly used method for purifying water on a large scale.
