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. Which of the following would come in use to treat diseased skin surfaces?
[A] Analgesics
[B] Antiseptics
[C] Antihistamines
[D] None of the above
Show Answer
Correct Answer: B [ Antiseptics]
Notes:
Antiseptics are applied to the living tissues such as wounds, cuts, ulcers and diseased skin surfaces. Examples of antiseptics are furacine, soframicine, etc
2. Which among the following metals is the hardest metal?
[A] Platinum
[B] Gold
[C] Iron
[D] Tungsten
Show Answer
Correct Answer: D [Tungsten]
Notes:
Tungsten has the highest tensile strength of any natural metal, with an ultimate strength of 1510 megapascals. Tungsten has the highest melting point (3422 °C, 6192 °F), lowest vapor pressure (at temperatures above 1650 °C, 3000 °F).
3. Which of the following antiseptic compounds is present in Dettol?
[A] Iodine
[B] Cresol
[C] Chloroxylenol
[D] Biothional
Show Answer
Correct Answer: C [ Chloroxylenol ]
Notes:
Chloroxylenol, also known as para-chloro-meta-xylenol, is an antiseptic and disinfectant which is used for skin disinfection and cleaning surgical instruments. It is also used within a number of household disinfectants and wound cleaners.
4. Which of the following makes the skin layer impervious to water?
[A] Melanin
[B] Collagen
[C] Keratin
[D] Chitin
Show Answer
Correct Answer: C [Keratin]
Notes:
Keratin is a family of fibrous structural proteins involved in making up the outer layer of human skin. It is also the key structural component of hair and nails. Cells in the epidermis contain a structural matrix of keratin, which makes this outermost layer of the skin almost waterproof, and along with collagen and elastin, gives skin its strength. It also makes up fish scales and crustacean shells, bird feathers and beaks, animal horns and hooves.
5. Which of the following is a tapeworm?
[A] Enterobius
[B] Fasciola
[C] Taenia
[D] Schistosoma
Show Answer
Correct Answer: C [Taenia]
Notes:
Taenia is a genus of tapeworm that includes some important parasites of livestock. Members of the genus are responsible for taeniasis and cysticercosis in humans. There are more than 100 species recorded. They are morphologically characterized by a ribbon-like body composed of a series of segments called proglottids with proximal mouth called scolex.
6. Which angiosperm is vesselless?
[A] Maize
[B] Trochodendron
[C] Hydrilla
[D] Wheat
Show Answer
Correct Answer: B [Trochodendron]
Notes:
Trochodendron is a genus of flowering plants with one living species. It is vesselless angiosperm. Fewer than 200 species of angiosperms have the primitive feature of vesselless wood. With two exceptions— Trochodendron and Tetracentron; all vesselless angiosperms occur in the Magnolidae.
7. Osteocytes are found in ____:
[A] Blood
[B] Bone
[C] Lymph
[D] Cartilage
Show Answer
Correct Answer: B [Bone]
Notes:
An osteocyte, a star shaped cell, is the most commonly found cell in mature bone, and can live as long as the organism itself. Osteocytes are networked to each other via long cytoplasmic extensions that occupy tiny canals called canaliculi, which are used for exchange of nutrients and waste through gap junctions. The space that an osteocyte occupies is called a lacuna.
8. Dumb-bell shaped guard cells are present in
____:
[A] Mango
[B] Wheat
[C] Gram
[D] Groundnut
Show Answer
Correct Answer: B [Wheat]
Notes:
Monocost and dicots differ in the location of stomata and shape of guard cells. In monocots stomata are Dumb-bell shaped in dicots they are bean-shaped.
9. The most serious air pollutant causing health hazard is ____:
[A] Ozone
[B] Sulphur dioxide
[C] Nitrogen oxide
[D] Carbon monoxide
Show Answer
Correct Answer: B [Sulphur dioxide]
Notes:
Sulphur dioxide (SO2) is considered as the most serious single air pollutant causing health hazard, obstructing breathing. It always leads to airways inflammation, eye irritation, psychic alterations, pulmonary oedema, heart failure and circulatory collapse. It is also responsible for acid rain.
10. What is the name of a group of similar cells performing a specific function?
[A] Organ
[B] Tissue
[C] Organ system
[D] Cellular organization
Show Answer
Correct Answer: B [Tissue]
Notes:
A tissue is a group of similar cells that work together to perform a specific job. Tissues function to perform many tasks that are too complicated for a single cell to perform. Tissues are used for support, movement, secretion, protection, growth, and reproduction. Specialized cells form specialized tissues such as blood tissue.