GK Quiz with Answers & Explanations

Q. Which one of the following statements regarding viruses is not true?
(a) Viruses need living cells to reproduce.
(b) All viruses are parasites.
(c) Viruses can synthesize their food through photosynthesis
(d) Viruses are similar to chemical substances outside the host.

ans.c
Viruses can not synthesize their food through photosynthesis because they do not contain chlorophyll as they are non- living outside the host’s body.

Q. Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
(a) Desmosome
(b) Ribosome
(c) Lysosome
(d) Vacuoles

ans.c
Lysosomes contain a wide variety of hydrolytic enzymes (acid hydrolases) that break down macromolecules such as nucleic acids, proteins, and polysaccharides. So, they are known as storehouse of digestive enzymes.

Q. Blood is a type of
(a) Epithelial tissue
(b) Muscular tissue
(c) Nervous tissue
(d) Connective tissue

ans.d
Blood is a connective tissue that has a fluid matrix, called plasma, and no fibers. Erythrocytes (red blood cells), the predominant cell type, are involved in the transport of oxygen and carbon dioxide.

Q. Which one of the following is the major constituent of biogas?
(a) Carbon dioxide
(b) Nitrous oxide
(c) Methane
(d) Oxygen

ans.c
What is Bio- Gas?

Bio-gas is produced naturally through a process of anaerobic decomposition from waste / bio-mass sources like agriculture residue, cattle dung, sugarcane press mud, municipal solid waste, sewage treatment plant waste, etc. After purification, it is compressed and called CBG, which has pure methane content of over 95%.

What is CBG?

Compressed Bio-Gas is exactly similar to the commercially available natural gas in its composition and energy potential. With calorific value (~52,000 KJ/kg) and other properties similar to CNG, Compressed Bio-Gas can be used as an alternative, renewable automotive fuel.

Q. Radiations coming from the Sun are mostly in the form of
(a) light only
(b) light and long-wavelength infrared.
(c) light and short-wavelength infrared
(d) both short and long wavelength

ans.c
The sun emits shortwave radiation because it is extremely hot and has a lot of energy to give off. Once in the Earth’s atmosphere, clouds and the surface absorb the solar energy. The ground heats up and re-emits energy as longwave radiation in the form of infrared rays. Earth emits longwave radiation because Earth is cooler than the sun and has less energy available to give off.