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. The best example of Polyembryony is _____:
[A] Cocoa
[B] Capsicum
[C] Cycas
[D] Citrus
Show Answer
Correct Answer: D [Citrus]
Notes:
In citrus fruits such as oranges, the nucleus cells that surround the embryo start dividing and protrude into the embryo sac. These develop into embryos; thus resulting in the presence of more than one embryo inside each ovule. This condition is known as polyembryony.
32. 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.
33. Anaemia is caused because of deficiency of which of the following?
[A] Cobalt
[B] Iron
[C] Sodium
[D] Calcium
Show Answer
Correct Answer: B [Iron]
Notes:
Anaemia is a condition that develops when blood lacks enough healthy red blood cells or haemoglobin. The three main types of Anaemia are due to blood loss, decreased red blood cell production, and increased red blood cell breakdown. Causes of decreased production include iron deficiency, a lack of vitamin B12, thalassemia, and a number of neoplasms of the bone marrow.
34. Chlorophyll containing autotrophic thallophytes is called as _____:
[A] Algae
[B] Lichens
[C] Fung
[D] Bryophytes
Show Answer
Correct Answer: A [Algae]
Notes:
Algae are chlorophyll (green pigment) containing thallophytes. They prepare their own food and are thus autotrophic in their mode of nutrition. Even liverworts among Bryophytes such as Riccia and Marchantia have thaloid structure.
35. Where does glucose breaks down into pyruvate?
[A] Golgi bodies
[B] Cytoplasm
[C] Protoplasm
[D] Chloroplast
Show Answer
Correct Answer: B [Cytoplasm]
Notes:
During glycolysis, glucose is broken down in ten steps to two molecules of pyruvate in cytoplasm (in the cellular matrix called cytosol). It then enters the mitochondria where it is oxidised through the tricarboxylic acid cycle to carbon dioxide and water.
36. Name the Japanese art of miniaturisation of trees.
[A] Ikebana
[B] Origami
[C] Bonsai
[D] Kirigami
Show Answer
Correct Answer: C [Bonsai]
Notes:
Bonsai is the art of aesthetic miniaturization of trees and plants in containers. A bonsai plant is not a dwarf plant but equal to the full sized flowering plant. The main objective of bonsai plants is to create a tree or plant, and even landscapes, in miniature at household level.
37. The plants, which grow under water stress conditions of deserts are _____:
[A] Sciophytes
[B] Heliophytes
[C] Epiphytes
[D] Xerophytes
Show Answer
Correct Answer: D [Xerophytes]
Notes:
The term xerophyte refers to a plant species that has evolved over time to adapt to dry and arid regions like deserts. Xerophytes have adapted to be able to keep extremely large amounts of water for a long period of time. Without this capability, the plant would die, as the desert region itself does not provide enough water to sustain life. They have thick cuticle, sunken stomata and leaves modified in form of spines such as in opuntia.
38. The name of the longest muscle in human body is _____:
[A] Sartorius muscle
[B] Massete muscle
[C] Stapedius muscle
[D] Gluteus Maximus muscle
Show Answer
Correct Answer: A [Sartorius muscle]
Notes:
The Sartorius muscle is the longest muscle in the human body. It is a long, thin, superficial muscle that runs down the length of the thigh in the anterior compartment. Its upper portion forms the lateral border of the femoral triangle.
39. Bulbils takes part in ____:
[A] Respiration
[B] Sexual reproduction
[C] Food storage
[D] Vegetative reproduction
Show Answer
Correct Answer: D [Vegetative reproduction]
Notes:
Bulbil is a small bulblike organ of vegetative reproduction growing in leaf axils or on flower stalks of plants such as the onion and tiger lily. It is a reproductive organ that takes part in vegetative reproduction. The bulbils drop from the parent plant on to the ground, give out adventitious roots and develop into new plants. The other structures involved in vegetative propagation include rhizome, bulb, corm, cuttings, etc.
40. Opium is a plant product obtained from _____:
[A] Dried leaves
[B] Dried latex
[C] Stem bark
[D] Roots
Show Answer
Correct Answer: B [Dried latex]
Notes:
Opium is the dried latex obtained from the opium poppy. Opium contains approximately 12% morphine, an alkaloid, which is frequently processed chemically to produce heroin for the illegal drug trade. The latex also includes codeine and non-narcotic alkaloids such as papaverine, thebaine and noscapine.