General Science Questions (MCQs) for Competitive Examinations
General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations. These questions are part of GKToday’s 35000+ MCQs Bank Course in GKToday Android App
31. Scientific study of birds is known as ____:
[A] Malacology
[B] Limnology
[C] Herpetology
[D] Ornithology
Show Answer
Correct Answer: D [Ornithology]
Notes:
Ornithology is a branch of zoology that deals with the study of birds. The science of ornithology has developed several key concepts in evolution, behaviour and ecology such as the definition of species, the process of speciation, instinct, learning, ecological niches, guilds, island biogeography, phylogeography and conservation.
32. On an average how many million Red Blood Cells are present in a healthy human adult man per mm3 of blood?
[A] 1.5 – 2
[B] 2 – 2.5
[C] 5 – 5.5
[D] 9 – 9.5
Show Answer
Correct Answer: C [5 – 5.5]
Notes:
The primary function of the red blood cells, or erythrocytes, is to carry oxygen from the lungs to body tissues and to transfer carbon dioxide from the tissues to the lungs. The RBC is a count of the number of red blood cells per cubic millimeter of blood. Newborns: 4.8 – 7.2 million Adults: (males): 4.6 – 6.0 million
33. Which of the following is not an insectivorous plant?
[A] Nepenthes
[B] Drosera
[C] Utricularia
[D] Cuscuta
Show Answer
Correct Answer: D [Cuscuta]
Notes:
Insectivorous plants are : Aldrovanda, Archaeamphora, Brocchinia, Byblis, Catopsis, Dionaea, Drosera, Genlisea, Hel iamphora, Nepenthes, Palaeoaldrovanda, Philcoxia, Roridule, Sarracenia, Stylidium, Triphyophyllum, Utricularia etc. In India, it was introduced by Dr. M. Swaminathan under the leadership of Pt. Nehru.
34. Which Vitamins are those, if taken in excess can be dangerous as they are stored in the body?
[A] B and C
[B] A and D
[C] E and C
[D] B Complex
Show Answer
Correct Answer: B [A and D]
Notes:
Vitamins A, D, E, and K are the fat-soluble vitamins. Unlike water-soluble vitamins, these vitamins dissolve in fat and are stored in body tissues. Too much vitamin A, D, or K (Hypervitaminosis) can lead to increased levels that are unhealthy and can cause health consequences. For example, too much vitamin A can lead to birth defects.
35. The main use of salt in the diet is to ____:
[A] Produce in small amounts the hydrochloric acid required for the digestion of food
[B] Increase the solubility of the food particles in water
[C] Ease the process of cooking
[D] Make the taste of the food better
Show Answer
Correct Answer: A [Produce in small amounts the hydrochloric acid required for the digestion of food]
Notes:
Common table salt plays a primary role in the processes of digestion and absorption. Salt activates an enzyme in the mouth called salivary amylase. Salt also creates hydrochloric acid. Hydrochloric acid is a very important digestive secretion, which lines the stomach walls.
36. Which part of brain is also known as “little brain”?
[A] Cerebrum
[B] Cerebellum
[C] Thalamus
[D] Hypothalamus
Show Answer
Correct Answer: B [Cerebellum]
Notes:
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. i.e. in maintaining and coordinating body posture at different times of the day/night.
37. DNA fingerprinting is used to identify the _____:
[A] Parents
[B] Thieves
[C] Rapist
[D] All of the above
Show Answer
Correct Answer: D [All of the above ]
Notes:
DNA profiling (genetic finger printing) is a technique employed by forensic scientists to assist in the identification of individuals by their respective DNA profiles. DNA profiles are encrypted sets of numbers that reflect a person’s DNA makeup, which can also be used as the person’s identifier. Each individual has unique VNTR numbers and pattern except maternal twins.
38. Micro-organisms act upon the dead plants to produce ____:
[A] Wood
[B] Mushrooms
[C] Sand
[D] Humus
Show Answer
Correct Answer: D [Humus]
Notes:
Microorganisms or decomposers such as bacteria and fungi help in the process of recycling of nutrients by decomposing various dead organisms such as plants and animals to form humus. Humus is highly nutritious and rich in minerals and microbes vital for healthy plant growth.
39. Which of the following diseases is spread by pigs?
[A] Plague
[B] Zika
[C] Nipah
[D] Swine flu
Show Answer
Correct Answer: D [Swine flu]
Notes:
Swine flu is a disease of pigs that can, in rare cases, be passed to humans. It is a highly contagious respiratory disease caused by one of many Influenza A viruses. The disease is spread among pigs by direct and indirect contact, aerosols, and from pigs that are infected but do not have symptoms.
40. The Sigmoid Colon is part of _____:
[A] Anal Canal
[B] Large Intestine
[C] Small Intestine
[D] Ileum
Show Answer
Correct Answer: B [Large Intestine]
Notes:
The sigmoid colon is the last section of the bowel — the part that attaches to the rectum. It’s about a foot and a half long (around 40 centimeters) and is shaped like the letter “s.” The sigmoid colon is a short curving of the colon, just before the rectum. It is part of the large intestine.
