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
1. Who discovered electron?
[A] John Dalton
[B] James Chadwik
[C] Ernest Rutherford
[D] J J Thomson
Show Answer
Correct Answer: D [J J Thomson]
Notes:
Electron was discovered by an Irish scientist J J Thomson and electron is the first subatomic particle to be discovered. J J Thomson is notable for proposing the water melon model which is also called as plum pudding model.
2. Root cap is derived from
____:
[A] Dermatogen
[B] Calyptrogen
[C] Protoderm
[D] Histogen
Show Answer
Correct Answer: B [Calyptrogen]
Notes:
Calyptrogen is a layer of rapidly dividing cells at the tip of a plant root, from which the root cap is formed. It occurs in grasses and many other plants. The root cap is formed by several layers of cells that envelop the root tip externally. This covering of cells, of which the outermost ones are dead, envelops and protects the growing tip of root.
3. Which word is common in the botanical names of trees like Ashoka, Tamarind or Coral?
[A] Terminalia
[B] Indica
[C] Salix
[D] Acacia
Show Answer
Correct Answer: B [Indica]
Notes:
Tamarind tree (Tamarindus indica), Ashoka tree (Saraca Indica), Indian Coral tree (Erythrina Indica) have ‘Indica’ common in their botanical names. In biology/taxonomy, if a species originates in India, its scientific name sometimes includes “Indica”.
4. Fat present below the skin surface in our body acts as a barrier against ____:
[A] Loss of heat from the body
[B] Loss of salt from the body
[C] Loss of essential body fluids
[D] Entry of harmful micro-organisms from the environment
Show Answer
Correct Answer: A [Loss of heat from the body]
Notes:
A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen and fat cells, helps conserve the body’s heat and protects the body from injury by acting as a “shock absorber.
5. Biodegradable wastes can usually be converted into useful substances with the help of ____:
[A] Bacteria
[B] Viruses
[C] Nuclear proteins
[D] Radioactive substances
Show Answer
Correct Answer: A [Bacteria]
Notes:
Bacteria are the most abundant organisms which play important role in the decomposition of organic matter. Majority of bacteria involved in decomposition of organic matter are heterotrophs and autotrophs are least in proportion which are not directly involved in organic matter decomposition.
6. Motor skills are associated with which part of the brain?
[A] Parietal Lobe
[B] Occipital Lobe
[C] Frontal lobe
[D] Temporal lobe
Show Answer
Correct Answer: C [Frontal lobe]
Notes:
Motor skills are needed to control the movements of the different muscles in the human body. The frontal lobe plays a large role in voluntary movement. It houses the primary motor cortex which regulates activities like walking. The frontal lobes are also involved in problem solving, spontaneity, memory, language, initiation, judgement, impulse control, etc.
7. Which of the following are flowerless plants that produce cones and seeds in which seeds are not encased within an ovary?
[A] Hydrophytes
[B] Bryophytes
[C] Gymnosperms
[D] Angiosperms
Show Answer
Correct Answer: C [Gymnosperms]
Notes:
Gymnosperm are flowerless plant that produces cones and seeds. The term gymnosperm literally means “naked seed”, as gymnosperm seed are not encased within an ovary. Rather they sit exposed on the surface of the leaf like structures called bracts.
8. Which of the following pairs is correctly matched?
[A] Vitamin-B : Rickets
[B] Vitamin-A : Scurvy
[C] Vitamin-E : Reproduction
[D] Vitamin-C: Night-blindness
Show Answer
Correct Answer: C [Vitamin-E : Reproduction]
Notes:
Vitamin E is a fat soluble vitamin that is essential in many physiological processes. It plays an important role in the health and maintenance of proper reproductive system function. Without vitamin E the body cannot reproduce. It is also essential during pregnancy and is needed for the proper health and development of the fetus.
9. Which one of the following animals belongs to mollusca?
[A] Haliotis
[B] Hare
[C] Hydra
[D] Hyla
Show Answer
Correct Answer: B [Hare]
Notes:
Sea hares are molluscs. They belong to Phylum Mollusca and Class Gastropoda like snails. Like many other sea slugs (Subclass Opistobranchia), sea hares lack external shells as adults. Sea hares belong to Order Anaspidea.
10. In which form is glucose stored in our body?
[A] Insulin
[B] Glucose
[C] Glycogen
[D] Fat
Show Answer
Correct Answer: C [Glycogen]
Notes:
Glucose is stored in the body as glycogen. The liver stores glucose in the form of glycogen which is released when it is needed. Also, fat can be converted into glucose when needed. Only the glycogen stored in the liver can be made accessible to other organs.
