IIT JEE Practice Question and Answer

Q: In a plant cell, DNA may be found in 1807 0

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    only in the nucleus and mitochondria.
    Correct
    Wrong
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    only in the nucleus and chloroplasts
    Correct
    Wrong
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    in the nucleus, mitochondria, and chloroplasts.
    Correct
    Wrong
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    only in the nucleus.
    Correct
    Wrong
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Answer : 3. "in the nucleus, mitochondria, and chloroplasts."
Explanation :

Answer: C) in the nucleus, mitochondria, and chloroplasts. Explanation: All of the genetic information in a cell was initially thought to be confined to the DNA in the chromosomes of the cell nucleus. It is now known that small circular chromosomes, called extranuclear, or cytoplasmic, DNA, are located in two types of organelles found in the cytoplasm of the cell. These organelles are the mitochondria in animal and plant cells and the chloroplasts in plant cells. Chloroplast DNA (cpDNA) contains genes that are involved with aspects of photosynthesis and with components of the special protein-synthesizing apparatus that is active within the organelle. Mitochondrial DNA (mtDNA) contains some of the genes that participate in the conversion of the energy of chemical bonds into the energy currency of the cell—a chemical called adenosine triphosphate (ATP)—as well as genes for mitochondrial protein synthesis.

Q: The storage form of glucose in animals is 1806 0

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    Starch
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    Glucose
    Correct
    Wrong
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    Glycogen
    Correct
    Wrong
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    None of the above
    Correct
    Wrong
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Answer : 3. "Glycogen"
Explanation :

Answer: C) Glycogen Explanation: Glycogen is the storage form of glucose in animals and humans which is analogous to the starch in plants. Glycogen is synthesized and stored mainly in the liver and the muscles.

Q: The average age of 7 boys is increased by 1 year when one of tem whose age is replaced by a girl. What is the age of the girl ? 1806 0

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    33 yrs
    Correct
    Wrong
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    27 yrs
    Correct
    Wrong
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    21 yrs
    Correct
    Wrong
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    29 yrs
    Correct
    Wrong
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Answer : 4. "29 yrs"
Explanation :

Answer: D) 29 yrs Explanation: Let the avg age of 7 boys be 'p' yearsLet the age of the girl be 'q' yearsFrom given data,The age of 7 boys = 7p yearsNow the new average = (p + 1) when 22 yrs is replaced by qNow the age of all 7 will become = 7(p + 1) yrsHence, 7p - 22 + q = 7(p + 1) yrs7p - 22 + q = 7p + 7q = 22 + 7 = 29 Therefore, the age of girl = q = 29 years.

Q: Who wrote Das Kapital? 1805 0

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    Max Weber
    Correct
    Wrong
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    Karl Marx
    Correct
    Wrong
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    Adam Smith
    Correct
    Wrong
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    Vladmir Lenin
    Correct
    Wrong
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Answer : 2. "Karl Marx"
Explanation :

Answer: B) Karl Marx Explanation: Das Kapital, one of the major works of the 19th-century. Economist and philosopher Karl Marx (1818–83), wrote, in which he expounded his theory of the capitalist system, its dynamism, and its tendencies toward self-destruction.

Q: I shrink smaller every time I take a bath. What am I ? 1804 0

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Answer :
Explanation :

A Soap. Yes, it gets shrinks smaller every time we take a bath.

Q: The highway transportation system is coordinated by 1804 0

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    Department of Transportation
    Correct
    Wrong
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    Your local police department
    Correct
    Wrong
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    The Department of Education
    Correct
    Wrong
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    The Internal Revenue Service
    Correct
    Wrong
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Answer : 1. "Department of Transportation"
Explanation :

Answer: A) Department of Transportation Explanation:

Q: Which protocol does ping use? 1804 1

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    ICMP
    Correct
    Wrong
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    TCP
    Correct
    Wrong
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    BootP
    Correct
    Wrong
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    ARP
    Correct
    Wrong
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Answer : 1. "ICMP"
Explanation :

Answer: A) ICMP Explanation: ICMP means Internet Control Message Protocol and is always coupled with the IP protocol (There are 2 ICMP variants one for IPv4 and one for IPv6.) echo request and echo response are the two operation codes of ICMP used to implement ping.

Q: A batsman scored 180 runs which included 11 boundaries and 8 sixes. What percent of his total score did he make by running between the wickets ? 1804 0

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    62.45%
    Correct
    Wrong
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    51.42%
    Correct
    Wrong
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    48.88%
    Correct
    Wrong
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    47.32%
    Correct
    Wrong
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Answer : 3. "48.88%"
Explanation :

Answer: C) 48.88% Explanation: Number of runs made by running = 180 - (11 x 4 + 8 x 6)= 180 - (92)= 88Now, we need to calculate 88 is what percent of 180.⇒88180×100  = 48.888%.

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