IIT JEE Practice Question and Answer

Q: Which of the following is a characteristic of the Ascomycota? 1672 0

  • 1
    Sac formation
    Correct
    Wrong
  • 2
    Zygospore formation
    Correct
    Wrong
  • 3
    Basidium formation
    Correct
    Wrong
  • 4
    All of the above
    Correct
    Wrong
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Answer : 1. "Sac formation"
Explanation :

Answer: A) Sac formation Explanation: Ascomycota is a division or phylum of the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes.    Hence, Sac formation is a characteristic of the Ascomycota fungi.

Q: A shopkeeper sells two articles at Rs.1000 each, making a profit of 30% on the first article and a loss of 20% on the second article. Find the net profit or loss that he makes ? 1671 0

  • 1
    0.85 %
    Correct
    Wrong
  • 2
    0.95 %
    Correct
    Wrong
  • 3
    1.0 %
    Correct
    Wrong
  • 4
    1.3 %
    Correct
    Wrong
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Answer : 2. "0.95 %"
Explanation :

Answer: B) 0.95 % Explanation: SP of first article = 1000Profit = 30%CP = (SP)x[100/(100+P)] = 10000/13 SP of second article = 1000Loss = 20%CP = (SP)x[100/(100-L)] = 5000/4 = 1250 Total SP = 2000 Total CP = 10000/13 + 1250 = 2019.23 CP is more than SP, he makes a loss. Loss = CP-SP = 2019.23 - 2000 = 19.23Loss Percent = [(19.23)/(2019.23)]x100 = 0.95 %.

Q: The preamble to our constitution provided that India is 1671 0

  • 1
    a sovereign, socialist, secular and democratic republic
    Correct
    Wrong
  • 2
    a sovereign republic with a socialist pattern of society
    Correct
    Wrong
  • 3
    a socialist, secular and democratic republic
    Correct
    Wrong
  • 4
    a sovereign, socialist and democratic republic
    Correct
    Wrong
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Answer : 1. "a sovereign, socialist, secular and democratic republic"
Explanation :

Answer: A) a sovereign, socialist, secular and democratic republic Explanation: The Preamble was adopted with the constitution in the constituent assembly.   The Preamble proclaims the solemn resolution of the people of India to constitute India into a 'Sovereign socialist secular democratic republic'.

Q: Absolute value of 9? 1671 0

  • 1
    0
    Correct
    Wrong
  • 2
    9
    Correct
    Wrong
  • 3
    8
    Correct
    Wrong
  • 4
    -9
    Correct
    Wrong
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Answer : 2. "9"
Explanation :

Answer: B) 9 Explanation: Absolute value of a number : It means that the distance of a number from 0 on a number line.    Here absolute value of 9 is that on a number line 9 is 9 units away from 0. Hence its absolute value is 9. Similarly, absolute value of -9 means -9 is also 9 units away from the 0 on number line. Hence, absolute value of -9 is also 9.   Hence, the absolute value of 9 is 9.

Q: What is the first term of an arithmetic progression of positive integers ? (I) Sum of the squares of the first and the second term is 116. (II)The fifth term is divisible by 7. 1671 0

  • 1
    Only a is sufficient
    Correct
    Wrong
  • 2
    Only b is sufficient
    Correct
    Wrong
  • 3
    Both a & b are necessary
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 1. "Only a is sufficient"
Explanation :

Answer: A) Only a is sufficient Explanation: The sum of square of two no is 116 i.e no lie 1-11, because 11x11 =121 which is greater than 116 again after cheaking all possible pair of no only 4 and 10 satisfy this condsn , again the progression is of positive integer so 10 cant not be 1st termso the 1st term is 4,but from the 2nd we cant able to find the 1st term so only 1st statement is sufficient to answer the question

Q: What will come in place of the question mark(?) in the following question ? 56% of 870 + 82% of 180 = 32% of 90 + ? 1671 0

  • 1
    777
    Correct
    Wrong
  • 2
    666
    Correct
    Wrong
  • 3
    606
    Correct
    Wrong
  • 4
    789
    Correct
    Wrong
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Answer : 3. "606"
Explanation :

Answer: C) 606 Explanation: 56% of 870 = 56x870/100 = 487.20 82% of 180 = 82x180/100 = 147.60 32% of 90 = 32x90/100 487.20 + 147.6 - 28.8  =  ? ? = 634.8  - 28.8 ? = 606.

Q: Number Challenge 1670 0

  • 1
    9
    Correct
    Wrong
  • 2
    11
    Correct
    Wrong
  • 3
    13
    Correct
    Wrong
  • 4
    15
    Correct
    Wrong
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Answer : 2. "11"
Explanation :

Answer: B) 11 Explanation: Half the Product of Number in the upper & lower box gives the number in the middle box. i.e. 18 x 4/2 = 36 15 x 6/2 = 45 In the same way  8 x N/2 = 44 => N = 11.

Q: What happens during the S-phase of the cell cycle? 1670 0

  • 1
    cell division
    Correct
    Wrong
  • 2
    cell growth
    Correct
    Wrong
  • 3
    DNA replication
    Correct
    Wrong
  • 4
    protein and enzyme synthesis
    Correct
    Wrong
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Answer : 3. "DNA replication"
Explanation :

Answer: C) DNA replication Explanation: S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between G1 phase and G2 phase. Precise and accurate DNA replication is necessary to prevent genetic abnormalities which often lead to cell death or disease.

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