IIT JEE Practice Question and Answer
8Q: Why is Golden Rice pale yellow in color? 1858 05b5cc6b9e4d2b4197774d6c6
5b5cc6b9e4d2b4197774d6c6- 1Rich in Beta-Carotenetrue
- 2Rich in Phycobilinsfalse
- 3Rich in Chlorophyllfalse
- 4Nonefalse
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Answer : 1. "Rich in Beta-Carotene"
Explanation :
Answer: A) Rich in Beta-Carotene Explanation: Golden Rice (Oryza sativa) denotes a genetically modified rice capable of biosynthesizing and accumulating β-carotene (provitamin A) in the endosperm, yielding a characteristic yellow color in the polished grains. Golden rice was developed to help cope with vitamin A deficiency, a problem that prevails in developing countries, affecting millions (Underwood, 2000; UNICEF, 2000). Vitamin A deficiency causes mortality and growth retardation in children and frequently impairs vision, leading to blindness. It also contributes indirectly to anemia by interfering with iron bioavailability. The endosperm of Golden Rice (Oryza sativa) is yellow due to the accumulation of β-carotene (provitamin A) and xanthophylls. The product of the two carotenoid biosynthesis transgenes used in Golden Rice results in Pale Yellow color.
Q: How many Types of Soil in India? 1658 05b5cc6b9e4d2b4197774d6c1
5b5cc6b9e4d2b4197774d6c1- 14false
- 25false
- 37false
- 48true
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Answer : 4. "8"
Explanation :
Answer: D) 8 Explanation: There are 8 different types of Soils present in India. They are primarily differentiated on the basis of composition and structure. They are :: 1. Alluvial soils, 2. Black soils, 3. Red soils, 4. Laterite and Lateritic soils, 5. Forest and Mountain soils, 6. Arid and Desert soils, 7. Saline and Alkaline soils and 8. Peaty and Marshy soils.
Q: Expansion cards are inserted into 2551 05b5cc6b9e4d2b4197774d6bc
5b5cc6b9e4d2b4197774d6bc- 1Peripheral Devicesfalse
- 2Pegsfalse
- 3Slotstrue
- 4The back of the computerfalse
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Answer : 3. "Slots"
Explanation :
Answer: C) Slots Explanation: In computing, the expansion card or board or accessory card is a printed circuit board that can be inserted into an electrical connector or expansion slot, on a computer motherboard, to add functionality to a computer system via the expansion bus.
Q: Which State has been declared as the Open Defecation Free state? 1516 05b5cc6b9e4d2b4197774d6b2
5b5cc6b9e4d2b4197774d6b2- 1Uttarakhandfalse
- 2Arunachal Pradeshtrue
- 3Maharashtrafalse
- 4Uttar Pradeshfalse
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Answer : 2. "Arunachal Pradesh"
Explanation :
Answer: B) Arunachal Pradesh Explanation: Arunachal Pradesh State has been declared as the Open Defecation Free state.
Q: In how many ways can letter of the word RAILINGS arrange so that R and S always come together? 1508 05b5cc6b9e4d2b4197774d6a8
5b5cc6b9e4d2b4197774d6a8- 11260false
- 22520false
- 35040true
- 41080false
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Answer : 3. "5040"
Explanation :
Answer: C) 5040 Explanation: The number of ways in which the letters of the word RAILINGS can be arranged such that R & S always come together is Count R & S as only 1 space or letter so that RS or SR can be arranged => 7! x 2! But in the word RAILINGS, I repeated for 2 times => 7! x 2!/2! = 7! ways = 5040 ways.
Q: A girl read 2/5 part of a book in 1st day, 34% in second day and remaining page in next two days. In two days she read equal number of page. If she read 52 pages on last day, then find out how many pages did the book contain? 1440 05b5cc6b9e4d2b4197774d6a3
5b5cc6b9e4d2b4197774d6a3- 1400true
- 2376false
- 3382false
- 4356false
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Answer : 1. "400"
Explanation :
Answer: A) 400 Explanation: 1st day the girl read = 40% 2nd day she read = 34 % Remaining percentage of book = 100% - (40% +34%) = 26% But given last two days she read equal number of pages => Each day she read 26%/2 = 13% Last day she read 52 pages = 13% 13% = 52 1% = 4 => 100% = 400 Total pages in the book is 400.
Q: What are long chains of Carbon Molecules called 1904 05b5cc6b8e4d2b4197774d699
5b5cc6b8e4d2b4197774d699- 1Ribosomesfalse
- 2Hydrocarbonsfalse
- 3Polymerstrue
- 4Nonefalse
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Answer : 3. "Polymers"
Explanation :
Answer: C) Polymers Explanation: A small organic molecule (sugars or amino acids), several of which may be bonded together to form a chain called a polymer.
Q: What is the Formula for Volume? 1693 05b5cc6b8e4d2b4197774d693
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Answer :
Explanation :
The formula to find the volume is given by just multiplying Length, Breadth and Height of that object. Thus, V = L x B X H Volume Formulae : 1. Volume of Cube of side 's' = s x s x s = s3 cubic units. 2. Volume of Cylinder = πR2h cubic units. [Where R is Radius and h is height]

