IIT JEE Practice Question and Answer
8Q: Who proved that microorganisms cause disease? 1667 05b5cc69be4d2b4197774c7cd
5b5cc69be4d2b4197774c7cd- 1van Leeuwenhoekfalse
- 2Kochtrue
- 3Flemingfalse
- 4Pasteurfalse
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Answer : 2. "Koch"
Explanation :
Answer: B) Koch Explanation:
Q: Which of the following is true about blood plasma? 1666 05b5cc622e4d2b4197774b7e4
5b5cc622e4d2b4197774b7e4- 1The main protein component is hemoglobin.false
- 2It is a faint yellow fluid.false
- 3It is the same as serum but without the clotting proteins.false
- 4It is about 90% water.true
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Answer : 4. "It is about 90% water."
Explanation :
Answer: D) It is about 90% water. Explanation: The first option is incorrect because it is devoid of blood cell, also red blood cells so doesn’t contains haemoglobin. The second option is incorrect because plasma is colorless. The third option is also incorrect because plasma contains the clotting factors.
Q: What is the currency of Mexico ? 1666 05b5cc6cfe4d2b4197774e2d7
5b5cc6cfe4d2b4197774e2d7- 1Kronesfalse
- 2Lirafalse
- 3Pesotrue
- 4Mexican dollarsfalse
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Answer : 3. "Peso"
Explanation :
Answer: C) Peso Explanation:
Q: Transcription occurs in the 1666 05b5cc615e4d2b4197774b698
5b5cc615e4d2b4197774b698- 1DNAfalse
- 2Cytoplasmfalse
- 3Chromosomesfalse
- 4Nucleustrue
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Answer : 4. "Nucleus"
Explanation :
Answer: D) Nucleus Explanation: In the cell, transcription occurs in the nucleus in the presence of DNA. Terms transcription and translation in biology are generally related to the DNA and its properties. Human cells replicate. In order to do that, they have to produce the same constituents for the new cell that is to be made. The only way to do that is by producing proteins. The proteins are produced in the process that is called protein synthesis. The first step is in the nucleus where a particular gene is being expressed so it enables all protein factors to come and to replicate that part of a chromosome. This is finished when mRNA, the same single-stranded genetic code of a particular gene, is formed. This is transcription. Right after that, the mRNA enters the cytoplasm through nuclear pores. There, it could be translated into proteins by ribosomes. This process is called translation. Hence, Transcription occurs in the nucleus, whereas translation occurs in the cytoplasm.
Q: A hybrid of a donkey and a horse 1666 05b5cc690e4d2b4197774c465
5b5cc690e4d2b4197774c465- 1Panthera and Mulefalse
- 2Mules and Hinnystrue
- 3Liger and Hinnysfalse
- 4Wholphin and Mulefalse
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Answer : 2. "Mules and Hinnys"
Explanation :
Answer: B) Mules and Hinnys Explanation: Donkeys and horses can be breed to make mules and hinnys. A hinny is a domestic equine hybrid that is the offspring of a male horse, a stallion, and a female donkey, a jenny. It is the reciprocal cross to the more common mule, which is the product of a male donkey, a jack, and a female horse, a mare.
Q: Nucleus of Hydrogen atom consists of 1665 05b5cc6aee4d2b4197774d149
5b5cc6aee4d2b4197774d149- 12 protons onlyfalse
- 22 neutrons onlyfalse
- 31 proton onlytrue
- 41 electron onlyfalse
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Answer : 3. "1 proton only"
Explanation :
Answer: C) 1 proton only Explanation: The nucleus of hydrogen consists of only a single proton. Its parts are a single negatively-charged electron that circles a single positively-charged nucleus of the hydrogen atom. The electron is bound to the nucleus by the Coulomb force.
Q: Which technology is used in compact disks? 1665 15b5cc690e4d2b4197774c427
5b5cc690e4d2b4197774c427- 1Lasertrue
- 2Mechanicalfalse
- 3Electricalfalse
- 4Electro magneticfalse
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Answer : 1. "Laser"
Explanation :
Answer: A) Laser Explanation: Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982. These are actually made to replace floppy disks that were used to store files and programs from the computer. The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM). These CD's uses Laser technology.
Q: A jogger running at 9 kmph alongside a railway track is 240 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction. In how much time will the train pass the jogger ? 1664 05b5cc6dee4d2b4197774ea5b
5b5cc6dee4d2b4197774ea5b- 110 secfalse
- 248 secfalse
- 336 sectrue
- 456 secfalse
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Answer : 3. "36 sec"
Explanation :
Answer: C) 36 sec Explanation: Given speed of jogger = 9 kmph Speed of train = 45 kmphAs they are in same direction, Relative speed = 45 - 9 = 36 kmph = 36x5/18 = 10 m/sDistance = 240 + 120 = 360 mts Time = distance/speed = 360/10 = 36 sec.

