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
41. Which of the following acids is synthesized in human stomach?
[A] Hydrochloric acid
[B] Sulphuric acid
[C] Nitric acid
[D] Phosphoric acid
Show Answer
Correct Answer: A [Hydrochloric acid]
Notes:
A typical adult human stomach will secrete about 1.5 liters of gastric acid daily. The best-known component of gastric juice is hydrochloric acid, the secretory product of the parietal, or oxyntic cell. It is known that the capacity of the stomach to secrete HCl is almost linearly related to parietal cell numbers.
42. Malaria is transmitted from one person to another by ____:
[A] Culex Mosquito
[B] Anopheles Mosquito
[C] Aedes Mosquito
[D] All of the above
Show Answer
Correct Answer: B [Anopheles Mosquito]
Notes:
Malaria is a mosquito-borne infectious disease which begins with a bite from an infected female Anopheles mosquito, which introduces the protists through saliva into the circulatory system. In the blood, the protists travel to the liver to mature and reproduce.
43. Phototropic movement is controlled by ____:
[A] Auxin
[B] Gibberellin
[C] Cytokinin
[D] Ethylene
Show Answer
Correct Answer: A [Auxin]
Notes:
Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light.
44. Eutrophication of a water body enhances
_____:
[A] Organic matter production
[B] Biological oxygen demand
[C] Both (a) & (b)
[D] None of the above
Show Answer
Correct Answer: C [Both (a) & (b)]
Notes:
Eutrophication is the ecosystem response to the addition of artificial or natural substances, such as nitrates and phosphates, through fertilizers or sewage. It leads not only to increased levels of nutrients, but increased Biological Oxygen Demand as well following the decay of algal bloom in stagnant water reservoirs.
45. By which process, a tadpole develops into an adult frog?
[A] Budding
[B] Embedding
[C] Fertilisation
[D] Metamorphosis
Show Answer
Correct Answer: D [Metamorphosis]
Notes:
Metamorphosis is a process by which animals undergo extreme, rapid physical changes some time after birth. Commonly known examples of metamorphosis include the process undergone by most insects, and the transformation of tadpoles into frogs. Hormones called molting and juvenile hormones, which are not species specific, apparently regulate the changes.
46. Which of the following full form of ATP is correct?
[A] Adenine tetra-phosphate
[B] Adenosine tetra-phosphate
[C] Adenosine triphosphate
[D] None of the above
Show Answer
Correct Answer: C [Adenosine triphosphate]
Notes:
ATP stands for Adenosine Triphosphate. It is a molecule that carries energy within cells. It is the main energy currency of the cell, and it is an end product of the processes of photophosphorylation (adding a phosphate group to a molecule using energy from light), cellular respiration, and fermentation.
47. Which organ gets affected in Weil’s disease?
[A] Kidney
[B] Lungs
[C] Heart
[D] Liver
Show Answer
Correct Answer: A [Kidney]
Notes:
Weil’s disease is a severe form of leptospirosis, a type of infection caused by Leptospira bacteria. The classic form of severe leptospirosis is known as Weil’s disease, which is characterized by liver damage (causing jaundice), kidney failure, and bleeding.
48. Which of the following is not a connective tissue?
[A] Compact Bone
[B] Adipose Tissue
[C] Cardiac Muscle
[D] Areolar Tissue
Show Answer
Correct Answer: C [Cardiac Muscle]
Notes:
Cardiac muscle (heart muscle) is striated muscle (striped muscle) in the walls of the heart. It is one of three main types of muscle, the others being skeletal and smooth muscle. Cardiac muscle makes up the tissue called the myocardium. It is involuntary; a person cannot control it consciously.
49. The seat of intelligence is situated in the ______:
[A] Medulla oblangata
[B] Thalamus
[C] Cerebellum
[D] Cerebrum
Show Answer
Correct Answer: D [Cerebrum]
Notes:
The cerebrum in fore brain is the seat of intelligence and provides us with the ability to read, write and speak; make calculations and compose music; remember the past and plan for the future; and create works. However, hypothalamus acts as centre for the emotional reactions regulating feeling of thirst, hunger, sexual desire, etc.
50. Iodex, a pain relief balm, has the smell of:
[A] Methyl salicylate
[B] Ethyl salicylate
[C] Propyl salicylate
[D] Butyl salicylate
Show Answer
Correct Answer: A [Methyl salicylate]
Notes:
Iodex has the characteristic odour of Methyl salicylate, an organic ester naturally produced by many species of plants, particularly wintergreens. It is used in high concentrations as a rubefacient and analgesic in deep heating linments to treat joint and muscular pain.
