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. Which part of the brain plays an important role in motor control?
[A] Pons
[B] Medulla
[C] Cerebrum
[D] Cerebellum
Show Answer
Correct Answer: D [Cerebellum]
Notes:
The cerebellum, also known as little brain, is a region of the brain that plays an important role in balance and motor control. It is also involved in some cognitive functions such as attention, language, emotional functions (such as regulating fear and pleasure responses) and in the processing of procedural memories.
32. Air bladder in fish acts as ____:
[A] Hydrostatic organ
[B] Accessory respiratory organ
[C] Both accessory respiratory organ and hydrostatic organ
[D] Primary respiratory organ
Show Answer
Correct Answer: A [Hydrostatic organ]
Notes:
Swim bladder is also known as air bladder for fishes. It is a buoyancy organ possessed by most bony fishes. The swim bladder is located in the body cavity and is derived from an out-pocketing of the digestive tube. It contains gas (usually oxygen) and functions as a hydrostatic, or ballast, organ, enabling the fish to maintain its depth without floating upward or sinking. It also serves as a resonating chamber to produce or receive sound.
33. 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.
34. The smallest bone in mammals is ____:
[A] Septomaxillary
[B] Dentary
[C] Femur
[D] Stapes
Show Answer
Correct Answer: D [Stapes ]
Notes:
The smallest bone in the human body is the stapes. The stapes is one of three small bones in the middle ear that allow mammals to transmit sound waves through their eardrum and hear. The stape bone is also known as the stirrup bone because it is shaped like a stirrup.
35. Which of the following causes swine flu?
[A] Fungi
[B] Virus
[C] Bacteria
[D] Tapeworm
Show Answer
Correct Answer: B [Virus]
Notes:
Swine influenza, also called pig influenza, swine flu, hog flu and pig flu, is an infection caused by any one of several types of swine influenza viruses. Swine flu, also known as the H1N1 virus, is a relatively new strain of an influenza virus that causes symptoms similar to the regular flu. It originated in pigs, but is now known to spread primarily from person to person.
36. Endoplasmic Reticulum are rough because of ____ present on their surface:
[A] Plastids
[B] Lysosomes
[C] Golgi bodies
[D] Ribosomes
Show Answer
Correct Answer: D [Ribosomes]
Notes:
There are two regions of endoplasmic reticulum that differ in both structure and function. One region is called rough ER because it has ribosomes attached to the cytoplasmic side of the membrane. The other region is called smooth ER because it lacks attached ribosomes.
37. Locomotory organ of a starfish is _____:
[A] Tube feet
[B] Muscular foot
[C] Flipper
[D] Paddle
Show Answer
Correct Answer: A [Tube feet]
Notes:
Starfish carry out movements with the help of tube feet that are part of the water vascular system. Apart from their function in locomotion, the tube feet act as accessory gills. The water vascular system serves to transport oxygen from, and carbon dioxide to, the tube feet and also nutrients from the gut to the muscles involved in locomotion.
38. The parts of human body affected by Pyria are _____:
[A] Small intestine
[B] Eyes
[C] Teeth and gums
[D] Large intestine
Show Answer
Correct Answer: C [Teeth and gums]
Notes:
Pyria, or periodontal disease, is a progressive gum disease characterized by inflammation resulting from the toxins found in plaque. It leads to bleeding of the gums. If allowed to progress, Pyria begins to destroy underlying tissue, which may eventually lead to premature tooth loss.
39. Onion is an example of bulb, which is a modified ____:
[A] Stem
[B] Flower
[C] Root
[D] Leaf
Show Answer
Correct Answer: A [Stem]
Notes:
Bulbs are modified stems of some plants. The stem is modified to be a storage organ where the plant stores its reserve materials which it would use in times of need. It has a modified flower bud or other growth point that is surrounded by modified, fleshy leaves that are referred to as scales. Onion is the best example of bulb.
40. The disease Beri Beri is caused due to the deficiency of which of the following?
[A] Vitamin B1
[B] Vitamin B2
[C] Vitamin B12
[D] Vitamin E
Show Answer
Correct Answer: A [Vitamin B1]
Notes:
Beriberi is a disease caused by a vitamin B1 (thiamine) deficiency. There are two types of the disease: wet beriberi and dry beriberi. Wet beriberi affects the heart and circulatory system. In extreme cases, wet beriberi can cause heart failure. Dry beriberi damages the nerves and can lead to a loss of muscle strength and eventually, muscle paralysis.