11 Important General Science MCQs for most of the competitive exams
Que 1: DNA consists of units called-
(A) Glucosides
(B) Deoxyribose
(C) Nucleotides
(D) Peptides
Correct Ans: C
Que 2: Golgi apparatus is most abundantly found in –
(A) Muscle cells
(B) Nerve cells
(C) Pancreatic cells
(D) Erythrocytes
Correct Ans: C
Que 3: The blue colour of the water in the sea is due to-
(A) Refraction of the blue light by the impurities in the sea water
(B) Reflection of blue sky by sea water
(C) Scattering if blur light by water molecules
(D) Absorption of other colours except the blue colour by water molecules
Correct Ans: D
Que 4: Sometimes the tubes in the well-inflated tyres of a cycle left in the sun burst open-
(A) Because the pressure of air inside the tube increases
(B) Because the volume of air inside the tube increase due to rise in its temperature
(C) Because the tube containing air melts
(D) Because the volume and the pressure both increase
Correct Ans: B
Que 5: A glass tumbler containing ice shows droplets of water on the outer surface because-
(A) The outer surface of the tumbler shows hygroscopic effect
(B) Water from inside oozes out through the wall of the tumbler
(C) The moisture in the air on coming in contact with the cold surface of the tumbler condenses in the form of droplets of water
(D) (A) And (B) both
Correct Ans: C
Que 6: The vitamins which is generally excreted in urine is
(A) Vitamin A
(B) Vitamin B
(C) Vitamin C
(D) Vitamin B and C
Correct Ans: D
Que 7: Itching due to insect bite is caused by
(A) Formic acid
(B) Acetic acid
(C) Lactic acid
(D) Maleic acid
Correct Ans: A
Que 8: At high altitude, pressure cooker is preferable for cooking because the boiling point of water
(A) Reduces due to higher atmospheric pressure
(B) Reduces due to lower atmospheric pressure
(C) Increases due to reduced gravitational force
(D) Reduces due to increased Ozone content in the atmosphere
Correct Ans: B
Que 9: If excess fertilizer is applied to a plant without water, the plant will
(A) Be stunted and growth
(B) Develop modifications
(C) Die due to plasmolysis
(D) Remain unaffected
Correct Ans: D
Que 10: Tips of leaves in grasses and common garden plants show water drops in early morning hours. this water accumulation is obtained from
(A) Atmosphere
(B) Stomata
(C) Vascular bundles
(D) Hydathodes
Correct Ans: D
Que 11: Which one of the following is not biodegradable?
(A) Woolen mat
(B) Silver foil
(C) Leather bag
(D) Jute basket
Correct Ans: D
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