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. Water in plants is trans-ported by _____:
[A] Phloem
[B] Xylem
[C] Cambium
[D] Epidermis
Show Answer
Correct Answer: B [Xylem]
Notes:
Water is transported through the plant in Xylem vessels, these begin in the roots and end in the leaves of the plant. Water is transported through a combination of “Transpirational pull” and capillary action that produces root pressure.
32. Which of the following is a fat-soluble vitamin that plays a role in blood clotting, bone metabolism and regulating blood calcium levels?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin C
[D] Vitamin K
Show Answer
Correct Answer: D [Vitamin K]
Notes:
Vitamin K refers to a group of fat-soluble vitamins that play a role in blood clotting, bone metabolism, and regulating blood calcium levels. The body needs vitamin K to produce prothrombin, a protein and clotting factor that is important in blood clotting and bone metabolism.
33. Adamsia (Sea anemone), Pennatula (Sea-pen) are examples of which Phylum?
[A] Aschelminthes
[B] Coelenterata
[C] Arthropoda
[D] Annelida
Show Answer
Correct Answer: B [Coelenterata]
Notes:
Adamsia (Sea anemone), Pennatula (Sea-pen) are examples of Anthozoa Class under Coelenterata Phylum. The organism under this phylum are mostly marine, solitary or colonial, sessile, or free-swimming and radially symmetrical animals. Other examples of Anthozoa class are Meandrina (brain-coral), Fungia, Gorgonia (sea fan or horny coral), etc.
34. Yellow spots on citrus leaves is due to the deficiency of _____:
[A] Zinc
[B] Iron
[C] Boron
[D] Magnesium
Show Answer
Correct Answer: D [Magnesium]
Notes:
The deficiency of magnesium leads to yellowish green blotch near the base of the leaf between the midrib and the outer edge (chlorosis). The yellow area enlarges until the only green remaining is at the tip and base of the leaf as an inverted V-shaped area on the midrib.
35. In plants, mature ovary changes to which part of the plant?
[A] Stamen
[B] Seed
[C] Pistil
[D] Fruit
Show Answer
Correct Answer: D [Fruit]
Notes:
The ovule matures to form the seed while the ovary, that is the outermost, forms the fruit. The seed coat is formed by the two integuments, which surround the embryo sac.
36. How many bones are there in the human body?
[A] 187
[B] 206
[C] 287
[D] 306
Show Answer
Correct Answer: B [206]
Notes:
A typical adult human skeleton consists of 206 bones. Individuals may have more or fewer bones than this owing to anatomical variations. These include: 22 Cranial and Facial Bones; 6 Ear Bones; 1 Throat Bone; 4 Shoulder Bones; 25 Chest Bones; 26 Vertebral Bones; 6 Arm and Forearm Bones; 54 Hand Bones; 2 Pelvic Bones; 8 Leg Bones; and 52 Foot Bones.
37. Dolly was an example of cloned ____:
[A] Dog
[B] Cow
[C] Sheep
[D] Hen
Show Answer
Correct Answer: C [Sheep]
Notes:
Dolly was the world’s first cloned sheep. It was born on 5 July 1996. It was a female domestic sheep, and the first mammal cloned from an adult somatic cell, using the process of nuclear transfer. Dolly was cloned by Ian Wilmut, Keith Campbell and colleagues at the Roslin Institute, part of the University of Edinburgh, Scotland.
38. Some of the ingredients required for bread making are _____:
[A] Maida and Baking Powder
[B] Maida and Ghee
[C] Maida and Baking Soda
[D] Maida and Yeast
Show Answer
Correct Answer: D [Maida and Yeast]
Notes:
Salt, fat and leavening agents such as yeast and baking soda are common ingredients, though bread may contain other ingredients also. Yeast plays an important role in bread-making. It ferments and grows when combined with “food” such as flour and/ or sugar, and warmed. Carbon dioxide is produced and trapped in the dough as tiny air bubbles which make the bread rise during cooking and give it its characteristic texture.
39. Which liquid is contained inside the nucleus of a cell?
[A] Protoplasm
[B] Cytoplasm
[C] Nucleosome
[D] Nucleoplasm
Show Answer
Correct Answer: D [Nucleoplasm]
Notes:
The nucleoplasm is the liquid or semi-liquid substance of the nucleus filling the space around the DNA and the nucleoli. It is a type of protoplasm that is made up mostly of water, a mixture of various molecules, and dissolved ions. It is completely enclosed within the nuclear membrane or nuclear envelope.
40. Scurvy is a disease which is caused due to the deficiency of vitamin _____:
[A] A
[B] B12
[C] C
[D] K
Show Answer
Correct Answer: C [C]
Notes:
Scurvy also once called ‘Sailor’s disease’ is a condition where an individual has a vitamin C (ascorbic acid) deficiency. Scurvy often presents itself initially as symptoms of malaise and lethargy, followed by formation of spots on the skin, spongy gums, and bleeding from the mucous membranes. Spots are most abundant on the thighs and legs, and a person with the ailment looks pale, feels depressed, and is partially immobilized. As scurvy advances, there can be open, suppurating wounds, loss of teeth, jaundice, fever, neuropathy and death.