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 protects the body against infectious disease and foreign invaders?
[A] Leukocytes
[B] Red blood cells
[C] Endoplasmic reticulum (ER)
[D] Golgi apparatus
Show Answer
Correct Answer: A [Leukocytes]
Notes:
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.
2. Butter is a ________?
[A] fat dispersed in milk
[B] fat dispersed in water
[C] water dispersed in fat
[D] None of the above
Show Answer
Correct Answer: A [fat dispersed in milk]
Notes:
Butter is a type of dairy product that is made by churning cream or milk until the fat particles in the milk coalesce to form a solid mass. The resulting solid mass is known as butter and it is composed mostly of butterfat, which is a type of fat that is found in milk. To be more specific, butter is a fat that is dispersed in milk. This means that the butterfat is evenly distributed throughout the milk, giving it a smooth and creamy texture. While butter is most commonly made from cow’s milk, it can also be produced from the milk of other mammals, such as sheep, goats, buffalo, and yaks.
3. A genetic code specifies how many kinds of amino acids?
Show Answer
Correct Answer: C [20]
Notes:
There are as many as 100 thousand kinds of proteins that constitute the body, and these comprise only 20 kinds of amino acids in various combinations.
4. Which of the following part of the body stores Vitamin A, Vitamin D as well as Vitamin B12?
[A] Brain
[B] Liver
[C] Pancreas
[D] Red Blood Cells
Show Answer
Correct Answer: B [Liver]
Notes:
Liver stores Vitamin A, Vitamin D as well as Vitamin B12. The bile juice secreted during digestion is essential for absorbing them so that the body can use them.
5. Who among the following scientists is known for devising four criteria designed to establish a causal relationship between a causative microbe and a disease?
[A] Louis Pasteur
[B] Emil Behring
[C] Ivan Pavlov
[D] Robet Koch
Show Answer
Correct Answer: D [Robet Koch]
Notes:
Dr. Robert Koch was a German (Prussian) physician. In 1877 he isolated Bacillus anthracis (causative agent of Anthrax) . He also isolated Tuberculosis bacillus (Causative agent of TB) and Vibrio cholera (causative agent of Cholera). He is also known to develop Koch’s postulates, the four criteria designed to establish a causal relationship between a causative microbe and a disease. He was awarded the Nobel Prize in Physiology or Medicine for his tuberculosis findings in 1905.
6. Antipyretic medicines are used for which among the following purposes?
[A] In fever
[B] In Diarrhea
[C] In Cough
[D] In Allergy
Show Answer
Correct Answer: A [In fever]
Notes:
Antipyretic medicines are used in fever. It is an analgesic drug used alone or in combination with opioids for pain management, and as an antipyretic agent.
7. Optical Fibre technology works on which of these principles of Physics?
[A] Bernoulli’s Principle
[B] Newton’s law of Motion
[C] Total internal reflection of Light
[D] Photoelectric effect
Show Answer
Correct Answer: C [Total internal reflection of Light]
Notes:
Optical Fibre technology works on the principle of Total internal reflection of Light. It helps in transmitting light signals from one place to another with a negligible loss of energy, thereby enabling to carry more signals than copper cables.
8. Which of the following represents non-uniform motion?
[A] equal displacements in unequal intervals of time
[B] unequal displacements in unequal intervals of time
[C] equal displacements in equal intervals of time
[D] unequal displacements in equal intervals of time
Show Answer
Correct Answer: A [equal displacements in unequal intervals of time]
Notes:
An object is said to be in non-uniform motion if it undergoes equal displacements in unequal intervals of time. In non-uniform motion, the velocity is different at different instants.
9. Which of the following is true about universal gravitational constant in the case of two bodies each of unit mass having their centres placed at unit distance apart?
[A] It is equal to the force of attraction between them
[B] It is equal to twice the force of attraction between them
[C] It is equal to half the force of attraction between them
[D] It is equal to ten times the force of attraction between them
Show Answer
Correct Answer: A [It is equal to the force of attraction between them]
Notes:
The universal gravitational constant is equal to the force of attraction between two bodies each of unit mass having their centres placed at unit distance apart. F = Gm1m2/r When m1 and m2 = 1 and r=1 then F=G.
10. Which of the following is correct about acceleration due to gravity?
[A] it increases with depth
[B] it decreases with depth
[C] it is independent of depth
[D] None of the above
Show Answer
Correct Answer: B [it decreases with depth]
Notes:
The value of acceleration due to gravity decreases with depth. g0= g(1-d/R) where d is the depth below the centre of the earth.
