IIT JEE Practice Question and Answer

Q: Which of the following describes the process of glycolysis? 2177 0

  • 1
    It represents the first stage in the chemical oxidation of glucose by a cell.
    Correct
    Wrong
  • 2
    Breakdown of Glucose
    Correct
    Wrong
  • 3
    Converts Glucose to Pyruvate
    Correct
    Wrong
  • 4
    All the above
    Correct
    Wrong
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Answer : 4. "All the above"
Explanation :

Answer: D) All the above Explanation: Glycolysis is the chemical process that converts glucose C₆H₁₂O₆, into Pyruvate, CH₃COCOO− + H⁺.   It represents the first stage in the chemical oxidation of glucose by a cell. The free energy released in this process is used to form the high-energy molecules ATP and NADH.

Q: The longest period of prenatal development is the 2177 0

  • 1
    Germinal period
    Correct
    Wrong
  • 2
    Fetal period
    Correct
    Wrong
  • 3
    Embryonic period
    Correct
    Wrong
  • 4
    None
    Correct
    Wrong
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Answer : 2. "Fetal period"
Explanation :

Answer: B) Fetal period Explanation: The third and longest period of prenatal development, extending from the ninth week until birth is Fetal period.   The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week are known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.

Q: The angles of a quadrilateral are in the ratio of 2:4:7:5. The smallest angle of the quadrilateral is equal to the smallest angle of a triangle. One of the angles of the triangle is twice the smallest angle of the triangle. What is the second largest angle of the triangle ? 2176 0

  • 1
    80 degrees
    Correct
    Wrong
  • 2
    60 degrees
    Correct
    Wrong
  • 3
    120 degrees
    Correct
    Wrong
  • 4
    40 degrees
    Correct
    Wrong
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Answer : 2. "60 degrees"
Explanation :

Answer: B) 60 degrees Explanation: Given the angles of a quadrilateral are in the ratio of 2:4:7:5Let the angles of a quadrilateral are 2x, 4x, 7x, 5xBut we know that sum of the angles = 360 degrees.=> 2x + 4x + 7x + 5x = 360=> x = 20Therfore, the smallest angle of the quadrilateral = 2x = 2x20 = 40 degrees.One of the angle of the triangle = 2 x 40 = 80 degreesThe other angle is 180 - (40 + 80) = 60 degrees. Hence the second largest angle of the triangle is 60 degrees.

Q: The average temperature of Monday to Wednesday was 37 C and of Tuesday to Thursday was 34 C. If the temperature on Thursday was 4/5 th of that of Monday, the temperature on Thursday was ? 2175 0

  • 1
    35 c
    Correct
    Wrong
  • 2
    36 c
    Correct
    Wrong
  • 3
    34 c
    Correct
    Wrong
  • 4
    32 c
    Correct
    Wrong
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Answer : 2. "36 c"
Explanation :

Answer: B) 36 c Explanation: Monday + Tuesday + Wednesday = 37 x 3 -----------(1)Tuesday + Wednesday + Thursday = 34 x 3---------(2)Thursday = 4/5 of Monday ------------------(3)subtract eqn (1) from (2) we get,Thursday - Monday = -9 => Monday - Thursday = 9.......(4)From (3) & (4), we get So,Thursday = 36 C

Q: The compound interest earned by Sunil on a certain amount at the end of two years at the rate of 8% p.a. was Rs.2828.80. Find the total amount that Sunil got back at the end of two years in the form of principal plus interest earned  ? 2174 0

  • 1
    Rs. 11828.80
    Correct
    Wrong
  • 2
    Rs. 19828.80
    Correct
    Wrong
  • 3
    Rs. 9828.80
    Correct
    Wrong
  • 4
    Rs. 19328.80
    Correct
    Wrong
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Answer : 2. "Rs. 19828.80"
Explanation :

Answer: B) Rs. 19828.80 Explanation: Let the sum be Rs. P P{ 1+81002- 1 } = 2828.80   It is in the form of  a2-b2 = a+ba-b   P(8/100)(2 + 8/100) = 2828.80   P = 2828.80 / (0.08)(2.08)   = 1360/0.08 = 17000   Principal + Interest = Rs. 19828.80

Q: What is the next number in series? 10, 9, 60, 90, 70, 66, ? 2171 0

  • 1
    73
    Correct
    Wrong
  • 2
    19
    Correct
    Wrong
  • 3
    96
    Correct
    Wrong
  • 4
    22
    Correct
    Wrong
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Answer : 3. "96"
Explanation :

Answer: C) 96 Explanation: ten = 3(number of letters)nine = 4(number of letters)sixty = 5(number of letters)ninety = 6(number of letters)seventy = 7(number of letters)sixtysix = 8(number of letters)ninetysix=96(number of letters) Then, likwise choose the number which has 9 letters in its Spelling.

Q: Productivity is the combination of 2170 0

  • 1
    efficiency and energy
    Correct
    Wrong
  • 2
    efficiency and effectiveness
    Correct
    Wrong
  • 3
    efficiency and attitude
    Correct
    Wrong
  • 4
    effectiveness and resources
    Correct
    Wrong
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Answer : 2. "efficiency and effectiveness"
Explanation :

Answer: B) efficiency and effectiveness Explanation: Productivity is a result of the way that a business operates – the result of the way that its people, business processes, different functional units and suppliers come together to meet the needs and wants of its customers. Productivity is the combination of intelligent planning and focused efforts and hence, it is a combination of Efficiency and Effectiveness. Efficiency : Efficiency is an internal measure of performance for companies that shows how well the company converts inputs into outputs. The more the ratio of outputs to inputs approaches 100 percent, the better the efficiency of the process will be. In simple terms, it is “doing things right” and comes from proper harnessing of time, cost and efforts. Effectiveness : Organizational effectiveness is an external measure of performance and indicates how well an organization fulfills the demands of various organizational stakeholders. Simply put, it is “doing the right things."

Q: Which of the following is not a polymer? 2168 0

  • 1
    DNA
    Correct
    Wrong
  • 2
    Glucose
    Correct
    Wrong
  • 3
    Starch
    Correct
    Wrong
  • 4
    Cellulose
    Correct
    Wrong
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Answer : 2. "Glucose"
Explanation :

Answer: B) Glucose Explanation: Since A polymer is a large molecule, or macromolecule, composed of many repeated subunits. Glucose is not a polymer.

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