IIT JEE Practice Question and Answer

Q: Which of the following statements about monosaccharide structure is true? 1999 0

  • 1
    Aldoses and ketoses differ in the position of their hydroxyl groups.
    Correct
    Wrong
  • 2
    Monosaccharides can be classified according to the spatial arrangement of their atoms.
    Correct
    Wrong
  • 3
    All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms.
    Correct
    Wrong
  • 4
    A six-carbon sugar is called a pentose.
    Correct
    Wrong
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Answer : 2. "Monosaccharides can be classified according to the spatial arrangement of their atoms."
Explanation :

Answer: B) Monosaccharides can be classified according to the spatial arrangement of their atoms. Explanation: Monosaccharides, also called simple sugars, are the most basic units of carbohydrates. They are fundamental units of carbohydrates and cannot be further hydrolyzed to simpler compounds.   Hence, Monosaccharides can be classified according to the spatial arrangement of their atoms is true about Monosaccharides.

Q: How many chromosomes are in a human gamete? 1998 0

  • 1
    23
    Correct
    Wrong
  • 2
    46
    Correct
    Wrong
  • 3
    92
    Correct
    Wrong
  • 4
    102
    Correct
    Wrong
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Answer : 1. "23"
Explanation :

Answer: A) 23 Explanation: 23 chromosomes are in a human gamete. Human somatic cells have 46 chromosomes(23 pairs) but a gamete(germ cell) gets half the amount, i.e. 23 chromosomes, (one from each pair). There will be half the number of chromosomes an organism has in its somatic cells (all other body cells except gametes).   For example in humans, the somatic cells contain 46 chromosomes which are the diploid number (2n) and each sperm and egg has 23 chromosomes where one of them is the sex chromosome.

Q: Who was the first cricketer to take all wickets in a test innings? 1997 0

  • 1
    Curtly Ambrose
    Correct
    Wrong
  • 2
    Jimmy Mathews
    Correct
    Wrong
  • 3
    Jim Laker
    Correct
    Wrong
  • 4
    Anil Kumble
    Correct
    Wrong
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Answer : 3. "Jim Laker"
Explanation :

Answer: C) Jim Laker Explanation: Jim Laker was the first player to take all 10 wickets in a Test match innings. Ten for 53 in the Australians 2nd innings of the 4th Ashes Test at Old Trafford in 1956.   The only other bowler to achieve the feat is India's Anil Kumble, who took ten for 74 at Delhi's Feroz Shah Kotla against Pakistan in 1999.

Q: Which structure is common to plant and animal cells? 1997 0

  • 1
    Centriole
    Correct
    Wrong
  • 2
    Chloroplast
    Correct
    Wrong
  • 3
    Central Vacuole
    Correct
    Wrong
  • 4
    Mitochondria
    Correct
    Wrong
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Answer : 4. "Mitochondria"
Explanation :

Answer: D) Mitochondria Explanation: Mitochondria are present in both plant and animal cells.

Q: 11 P in a CT 1997 0

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Answer :
Explanation :

11 P in a CT means 11 Players in a Cricket Team.

Q: How many Enzymes are there in the Human Body? 1997 0

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Answer :
Explanation :

There are nearly about 75000 enzymes of 3 classes are there in the human body. They are : 1. Metabolic Enzymes - Enzymes that help to run our Bodies 2. Digestive Enzymes - Enzymes that help in digesting Food 3. Food Enzymes - Enzymes from raw foods that start our Food digestion.

Q: A Committee of 5 persons is to be formed from a group of 6 gentlemen and 4 ladies. In how many ways can this be done if the committee is to be included atleast one lady? 1997 0

  • 1
    123
    Correct
    Wrong
  • 2
    113
    Correct
    Wrong
  • 3
    246
    Correct
    Wrong
  • 4
    945
    Correct
    Wrong
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Answer : 3. "246"
Explanation :

Answer: C) 246 Explanation: A Committee of 5 persons is to be formed from 6 gentlemen and 4 ladies by taking.    (i) 1 lady out of 4 and 4 gentlemen out of 6  (ii) 2 ladies out of 4 and 3 gentlemen out of 6  (iii) 3 ladies out of 4 and 2 gentlemen out of 6  (iv) 4 ladies out of 4 and 1 gentlemen out of 6    In case I the number of ways = C14×C46 = 4 x 15 = 60  In case II the number of ways = C24×C36 = 6 x 20 = 120  In case III the number of ways = C34×C26 = 4 x 15 = 60 In case IV the number of ways = C44×C16 = 1 x 6 = 6    Hence, the required number of ways = 60 + 120 + 60 + 6 = 246

Q: A seven letter word containing thousands of letters is what? 1997 0

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Answer :
Explanation :

It is a Postbox or a Mailbox which contains thousands of letters or mails or messages.

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