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. Phototropic movement is controlled by ____:
[A] Auxin
[B] Gibberellin
[C] Cytokinin
[D] Ethylene
Show Answer
Correct Answer: A [Auxin]
Notes:
Phototropism is the growth of organisms in response to light. In plants, phototropism is a response to blue wavelengths of light and is caused by a redistribution of auxin from the illuminated side to the darker side of the shoot, resulting in quicker growth on the darker side and bending of the shoot toward the source of light.
32. The National Institute of Mental Health and Neuro Sciences (NIMHANS) is located in _____:
[A] Kolkata
[B] Indore
[C] Puducherry
[D] Bengaluru
Show Answer
Correct Answer: D [Bengaluru]
Notes:
The National Institute of Mental Health and Nuro- Sciences is a premier medical institution located in Bengaluru, India. NIMHANS is the apex centre for mental health and neuroscience education in the country, the institute operates autonomously under the Ministry of Health and Family Welfare.
33. An invertebrate does not have _____:
[A] Notochord
[B] Body cavity
[C] Haemocoel
[D] Gills
Show Answer
Correct Answer: A [Notochord]
Notes:
All verteberates have notochord, body cavity and gills in their embryonic stage or adult stage but not have haemocoel. It’s presence is well marked in the members of phylum in Arthopoda.
34. Which of the following is not a component of chlorophyll?
[A] Carbon
[B] Magnesium
[C] Hydrogen
[D] Calcium
Show Answer
Correct Answer: D [Calcium]
Notes:
Chlorophyll, a photo-receptive pigment, allows plants to absorb sunlight. Chlorophyll is a chlorine pigment, which is structurally similar to and produced through the same metabolic pathway as other porphyrin pigments such as heme. At the center of the chlorine ring is a magnesium ion. The molecular formula of C55H70O6N4 Mg. Hence, chlorophyll as a pigment lacks calcium.
35. Which part of brain is also known as “little brain”?
[A] Cerebrum
[B] Cerebellum
[C] Thalamus
[D] Hypothalamus
Show Answer
Correct Answer: B [Cerebellum]
Notes:
The cerebellum is known as little brain. It is a region of the brain that plays an important role in motor control. i.e. in maintaining and coordinating body posture at different times of the day/night.
36. Which of the following enzyme is essential for clotting of blood?
[A] Renin
[B] Thrombin
[C] Amylase
[D] Pepsin
Show Answer
Correct Answer: B [Thrombin]
Notes:
Thrombin is a serine protease, an enzyme, that is at the centre of blood clotting process in human beings. It catalyzes the conversion of fibrinogen to fibrin and activates procoagulant factors V, VIII, XI, and XIII. Additionally, when bound to thrombo-modulin, it activates protein C, an anticoagulant zymogen.
37. 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.
38. Which of the following type of medicine is used for treating indigestion?
[A] Antacid
[B] Analgesic
[C] Antibiotic
[D] Antiseptic
Show Answer
Correct Answer: A [Antacid]
Notes:
An antacid is a substance which neutralizes stomach acidity and is used to relieve heartburn, indigestion or an upset stomach. When excessive amounts of acids are produced in the stomach the natural mucous barrier that protects the lining of the stomach can damage the esophagus in people with acid reflux. Antacids contain alkaline ions that chemically neutralize stomach gastric acid, reducing damage and relieving pain.
39. The term gene was coined by _____:
[A] De Vries
[B] T. H. Morgan
[C] W. L. Johanssen
[D] G. Mendel
Show Answer
Correct Answer: C [W. L. Johanssen]
Notes:
Wilhelm Johannsen was a Danish botanist, plant physiologist and geneticist. His most well-known research concerned so-called pure lines of the self-fertile common bean. He was able to show that even in populations homozygous for all traits, i.e. without genetic variation, seed size followed a normal distribution. This was attributable to resource provision to the mother plant and to the position of seeds in pods and of pods on the plant. This led him to coin the terms phenotype and genotype and introduce the term gene. This term was coined in opposition to the then common pangene that stemmed from Darwin’s theory of pangenesis.
40. Deficiency of which of the following nutrients is the most common cause of goiters?
[A] Iodine
[B] Calcium
[C] Iron
[D] Vitamin C
Show Answer
Correct Answer: A [Iodine]
Notes:
A goitre, or goiter, is a swelling in the neck resulting from an enlarged thyroid gland. A goitre can be associated with a thyroid that is not functioning properly. Worldwide, over 90% of goitre cases are caused by iodine deficiency. The term is from the Latin gutturia, meaning throat.