IIT JEE Practice Question and Answer
8Q: Why is Meiosis called Reduction Division? 1685 05b5cc6b0e4d2b4197774d2e4
5b5cc6b0e4d2b4197774d2e4- Show AnswerHide Answer
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Answer :
Explanation :
Meiosis :: Meiosis is a type of cell division that reduces the chromosome number by half in daughter cells, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them. Why it is called as Reduction Division :: 1. As the Meiosis division process involves in reduction of chromosome number in the daughter cells to half the number in the parent cell, this process is called Reduction Division.Meiosis creates gametes (egg and sperm cells). 2. The resulting gametes have 23 new chromosomes, one member of each of the 23 pairs, representing unique combinations of the original maternal and paternal copies.
Q: Is steel a compound? 1684 05b5cc62ae4d2b4197774b8b5
5b5cc62ae4d2b4197774b8b5- 1TRUEfalse
- 2FALSEtrue
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Answer : 2. "FALSE"
Explanation :
Answer: B) FALSE Explanation: Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.
Q: What is 70 of 50? 1683 05b5cc675e4d2b4197774c13e
5b5cc675e4d2b4197774c13e- 135true
- 238false
- 342false
- 444false
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Answer : 1. "35"
Explanation :
Answer: A) 35 Explanation: what is 70 of 50 means 70% of 50 ⇒70 x 50100= 7 x 5= 35 Hence, 70 of 50 is 35.
Q: Which of the following is not a plantation crop? 1683 05b5cc6a8e4d2b4197774ce67
5b5cc6a8e4d2b4197774ce67- 1rubberfalse
- 2coffeefalse
- 3gramtrue
- 4coconutfalse
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Answer : 3. "gram"
Explanation :
Answer: C) gram Explanation: Gram is not a Plantation crop among the given options. Plantation crops are known as cash crops. These crops are mostly grown at tropical and subtropical areas. These crops are grown for sale but not for local consumption. such crops include rubber, coffee, tea, various oil seeds, sugar cane,etc. So, Gram is not a plantation crop.
Q: Which of the following is Not a Greenhouse Gas? 1683 05b5cc6ade4d2b4197774d12a
5b5cc6ade4d2b4197774d12a- 1Oxygentrue
- 2Methanefalse
- 3Nitrous Oxidefalse
- 4Carbondioxidefalse
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Answer : 1. "Oxygen"
Explanation :
Answer: A) Oxygen Explanation: A greenhouse gas is a gas in an atmosphere that absorbs and emits radiant energy within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. Carbon dioxide is a main greenhouse gas, found in car exhaust pipes.Methane and nitrous oxide is another type of greenhouse gas. Oxygen is the only clean gas out there because we need it to survive. Therefore, the only gas that is not a greenhouse gas is Oxygen.
Q: What molecule carries genetic information? 1683 05b5cc699e4d2b4197774c74b
5b5cc699e4d2b4197774c74b- 1RNAfalse
- 2DNAtrue
- 3Proteinsfalse
- 4Nucleotidesfalse
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Answer : 2. "DNA"
Explanation :
Answer: B) DNA Explanation: The nucleus of a cell contains chromosomes, which carry genetic information in a long molecule called DNA. Genes are regions of DNA that carry the code to control a particular cell activity or the production of a particular protein.
Q: 100 percent of which number is 20? 1682 05b5cc6b0e4d2b4197774d28d
5b5cc6b0e4d2b4197774d28d- 1100false
- 2500false
- 320true
- 40false
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Answer : 3. "20"
Explanation :
Answer: C) 20 Explanation: Let the rquired number be 'P' According to the question, 100 x P100 = 20=> P = 20 x 100100 = 20 Hence, 100 percent of the number 20 is 20. Now, you can also try for 20 percent of what number is 100 20 x P100 = 100=> P = 100 x 10020 = 500=> P = 500 Hence, 20 percent of the number 500 is 100.
Q: Pollen grains in plants are produced in 1681 05b5cc69de4d2b4197774c8dc
5b5cc69de4d2b4197774c8dc- 1Flowertrue
- 2Stemfalse
- 3Rootsfalse
- 4Leavesfalse
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Answer : 1. "Flower"
Explanation :
Answer: A) Flower Explanation:

