IIT JEE Practice Question and Answer

Q: Okhla Bird Sanctuary is located in 2095 0

  • 1
    Rajasthan
    Correct
    Wrong
  • 2
    West Bengal
    Correct
    Wrong
  • 3
    Maharashtra
    Correct
    Wrong
  • 4
    Uttar Pradesh
    Correct
    Wrong
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Answer : 4. "Uttar Pradesh"
Explanation :

Answer: D) Uttar Pradesh Explanation: Okhla Bird Sanctuary is located in Uttar Pradesh. Okhla Bird Sanctuary is a bird sanctuary at the Okhla barrage over Yamuna River. It is situated in Noida, Gautam Buddh Nagar district, on Delhi-Uttar Pradesh state border and known as a haven for over 300 bird species.

Q: Solve the Riddle? 2094 0

  • 1
    79 hrs
    Correct
    Wrong
  • 2
    72 hrs
    Correct
    Wrong
  • 3
    52 hrs
    Correct
    Wrong
  • 4
    18 hrs
    Correct
    Wrong
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Answer : 4. "18 hrs"
Explanation :

Answer: D) 18 hrs Explanation: From the given data, 18 snakes can eat 18 bananas in 18 hrs. => 1 snake can eat 1 banana in 18 hrs => 79 snakes can eat 79 bananas in 18 hrs.   Hence, 18 hrs.

Q: Who discovered the monomers of nucleic acids? 2094 0

  • 1
    James Watson, Francis Crick, and Rosalind Franklin
    Correct
    Wrong
  • 2
    Friedrich Miescher
    Correct
    Wrong
  • 3
    Phoebus Levene
    Correct
    Wrong
  • 4
    Gerardus Johannes Mulder and Jöns Jacob Berxelius
    Correct
    Wrong
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Answer : 3. "Phoebus Levene"
Explanation :

Answer: C) Phoebus Levene Explanation: Deoxyribonucleic acid (DNA) is a nucleic acid polymer composed of monomers called nucleotides. Nucleotides are composed of three components: (1) a pentose sugar; (2) a nitrogenous base; and (3) one to three phosphate groups. Phoebus Levene, a Russian biochemist was the first to discover the nucleotide and the first to correctly identify the way nucleic acid molecules, DNA.

Q: When during the Cell Cycle are Chromosomes visible? 2094 0

  • 1
    only during interphase
    Correct
    Wrong
  • 2
    only during cell division
    Correct
    Wrong
  • 3
    only during G1 phase
    Correct
    Wrong
  • 4
    only during they are replicated
    Correct
    Wrong
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Answer : 2. "only during cell division"
Explanation :

Answer: B) only during cell division Explanation: During most of the cell cycle, interphase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells. The chromosomes are most easily seen and identified at the metaphase stage of cell division and most of the chromosome images in this gallery are pictures of metaphase chromomosomes. The cell division takes place in mitosis stage.

Q: A substance that cannot be broken down into simpler substances 2093 0

  • 1
    Heterogenous mixure
    Correct
    Wrong
  • 2
    Compound
    Correct
    Wrong
  • 3
    Homogenous mixture
    Correct
    Wrong
  • 4
    Element
    Correct
    Wrong
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Answer : 4. "Element"
Explanation :

Answer: D) Element Explanation: A substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen. Material composed of only one kind of matter throughout (same atoms or same molecules).

Q: If sum of upstream and downstream speed of a boat is 82 kmph, and the boat travels 105 km. upstream in 3 hr, Find the time taken by boat to cover 126 km downstream. 2093 0

  • 1
    2.8 hrs
    Correct
    Wrong
  • 2
    2.7 hrs
    Correct
    Wrong
  • 3
    2.6 hrs
    Correct
    Wrong
  • 4
    2.5 hrs
    Correct
    Wrong
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Answer : 2. "2.7 hrs"
Explanation :

Answer: B) 2.7 hrs Explanation: Let Speed of boat in still water = b Let Speed of still water = w Then we know that, Speed of Upstream = U = boat - water Speed of Downstream = D = boat + water Given, U + D = 82 b - w + b + w = 82 2b = 82 => b = 41 kmph From the given data, 41 - w = 105/3 = 35 w = 6 kmph Now, b + w = 126/t => 41 + 6 = 126/t => t = 126/47  = 2.68 hrs.

Q: In which year was the Supreme Court of India established? 2092 0

  • 1
    1951
    Correct
    Wrong
  • 2
    1949
    Correct
    Wrong
  • 3
    1950
    Correct
    Wrong
  • 4
    1947
    Correct
    Wrong
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Answer : 3. "1950"
Explanation :

Answer: C) 1950 Explanation: The Supreme Court of India was established in the year 1950.

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