IIT JEE Practice Question and Answer

Q: According to a survey, which country has become the second largest smartphone market in the world? 1312 0

  • 1
    Japan
    Correct
    Wrong
  • 2
    China
    Correct
    Wrong
  • 3
    India
    Correct
    Wrong
  • 4
    USA
    Correct
    Wrong
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Answer : 3. "India"
Explanation :

Answer: C) India Explanation: According to a Report by analyst firm Canalys, India has become the second largest smartphone market in the world.

Q: What do genes code for? 1311 0

  • 1
    Ptoteins
    Correct
    Wrong
  • 2
    DNA
    Correct
    Wrong
  • 3
    RNA
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Ptoteins"
Explanation :

Answer: A) Ptoteins Explanation: The genome of an organism is inscribed in DNA, or in some viruses RNA. The portion of the genome that codes for a protein or an RNA is referred to as a gene. Those genes that code for proteins are composed of tri-nucleotide units called codons, each coding for a single amino acid.

Q: I have a face but no eyes Puzzle 1310 0

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Answer :
Explanation :

A Clock has a face, but no eyes. It has 3 hands i.e, hours, minutes and seconds hands but no arms.

Q: A sum of Rs. 4,300 is distributed among M, N and O, such that M receives 25% more than N and N receives 25% less than O. What is O’s share in the amount? 1310 0

  • 1
    1564
    Correct
    Wrong
  • 2
    1600
    Correct
    Wrong
  • 3
    1632
    Correct
    Wrong
  • 4
    1714
    Correct
    Wrong
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Answer : 2. "1600"
Explanation :

Answer: B) 1600 Explanation: Let O's share = Rs. P => N's share = 75100 x P = 3P4 M's share = 54 x 3P4 = 15P16 15P16 + 3P4 + P = 4300=> P = 4300 x 1643 = 1600

Q: A man purchases two articles, on selling one at loss of 20% while the other at a profit of 25%, he gains the overall profit of 5% than find the ratio of their selling price ? 1307 0

  • 1
    8 : 62.5
    Correct
    Wrong
  • 2
    55 : 8
    Correct
    Wrong
  • 3
    8 : 65
    Correct
    Wrong
  • 4
    64.4 : 9
    Correct
    Wrong
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Answer : 1. "8 : 62.5"
Explanation :

Answer: A) 8 : 62.5 Explanation:                       Article I                   Article II                         -20                         25%                                        5%                         20%                       25%                                                4              :              5 Now, Selling of first article = (4-20%) = 0.8 Selling of second article = (5+25%) =  6.25 Therefore the ratio of selling price = 8 : 62.5

Q: Who of the following appointed as head of Punjab National Bank  ? 1307 0

  • 1
    Dinabandu Mohapatra
    Correct
    Wrong
  • 2
    Usha Ananthasubramanian
    Correct
    Wrong
  • 3
    R A Narayan
    Correct
    Wrong
  • 4
    Sunil Mehta
    Correct
    Wrong
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Answer : 4. "Sunil Mehta"
Explanation :

Answer: D) Sunil Mehta Explanation: Dinabandu Mohapatra for - Bank of India Usha Ananthasubramanian  for - Allahabad Bank R A Sankara Narayan for - Vijaya Bank

Q: Which of the following is an Autoimmune disease? 1305 0

  • 1
    Systematic lupus erythematosus
    Correct
    Wrong
  • 2
    Acute anaphylaxis
    Correct
    Wrong
  • 3
    Farmer's lung
    Correct
    Wrong
  • 4
    A heart attack
    Correct
    Wrong
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Answer : 1. "Systematic lupus erythematosus"
Explanation :

Answer: A) Systematic lupus erythematosus Explanation: An autoimmune disease is a condition in which your immune system mistakenly attacks your body.   The immune system normally guards against germs like bacteria and viruses. When it senses these foreign invaders, it sends out an army of fighter cells to attack them. Normally, the immune system can tell the difference between foreign cells and your own cells.   In an autoimmune disease, the immune system mistakes part of your body — like your joints or skin — as foreign. It releases proteins called autoantibodies that attack healthy cells. Some autoimmune diseases target only one organ. Type 1 diabetes damages the pancreas. Other diseases, like lupus, affect the whole body.   Hence, Systematic lupus erythematosus is an autoimmune disease that affects multiple organs.

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Answer : 4. "3"
Explanation :

Answer: D) 3 Explanation: Given teacher drinks 9 ltrLet number of boys be 'A'.Let number of girls be 'B'.Boy drinks 7 ltr and girl drinks 4 ltrAfter class total water consumed = 42 ltrThen,9 + 7A + 4B = 42=> 7A + 4B = 33By trial and error method,The only integers which satisfy the equation is A = 3 and B = 3Therefore, number of girls in the class = 3.

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