IIT JEE Practice Question and Answer
8Q: Why is Golden Rice pale yellow in color? 1856 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: Select the correct statement about oxygen transport in blood 1856 05b5cc69be4d2b4197774c7f9
5b5cc69be4d2b4197774c7f9- 1A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normalfalse
- 2During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2true
- 3During conditions of acidosis, hemoglobin is able to carry oxygen more efficientlyfalse
- 4Increased BPG levels in the red blood cells enhance oxygen-carrying capacityfalse
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Answer : 2. "During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2"
Explanation :
Answer: B) During normal activity, a molecule of hemoglobin returning to the lungs carries one molecule of O2 Explanation:
Q: Which of these did progressives support? 1855 05b5cc636e4d2b4197774ba13
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Answer :
Explanation :
One of the thing that progressive support would be: Direct election of senators. The progressive wanted this so they could the candidate based on the person and not the party.Direct election of senators will make it easier for them to elect the person that represent their value for the position.
Q: What is the distance around a shape called? 1855 05b5cc636e4d2b4197774ba2e
5b5cc636e4d2b4197774ba2e- 1Volumefalse
- 2Areafalse
- 3Massfalse
- 4Perimetertrue
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Answer : 4. "Perimeter"
Explanation :
Answer: D) Perimeter Explanation: The distance around a shape or figure I called Perimeter. A perimeter is a path that surrounds a two-dimensional shape.
Q: What led to the beginning of the Renaissance? 1855 05b5cc6a2e4d2b4197774cb65
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Answer :
Explanation :
The development in arts and letters known as the Renaissance(rebirth) was a revived interest in classical learning and culture in the 1300's and the 1400's in Italy, but later spread to other parts of Europe. The Renaissance involved new thought because it was a secular movement. During the feudal period, the Catholic Church was the center of learning; in fact, the medieval scholar had been concerned with the harnessing of reason in the defense and service of religion. But, with the end of feudalism and increased trading outside of Europe, new ideas emerged and the Renaissance scholar became more concerned with the secular side of things. Furthermore, poets and philosophers concerned themselves with the natural world, rather than theology. One reason for the scholarship in Italy is the fact that Greek scholars emigrated to Italy after the invasion of the Ottoman Turks who captured Constantinople. These scholars brought with them classical texts and manuscripts, which helped to revive interest in classical learning and arts. Along with the Greek scholars, Italian scholar Petrarch is felt to be a major impetus to the rebirth of culture and learning. Having a passionate interest in the rediscovery of lost Roman manuscripts and a strong belief in the power of ancient thought to civilize, his ideas certainly complemented those who valued classical learning.
Q: How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number? 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 1855 05b5cc7f2e4d2b41977751ea2
5b5cc7f2e4d2b41977751ea2- 12false
- 23false
- 34true
- 45false
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Answer : 3. "4"
Explanation :
Answer: C) 4 Explanation: We have to find out even number - even number - odd number sequence. 8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1 There are four such such even numbers: 6,8,2 and 8.
Q: A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions made by the larger wheel is ? 1855 05b5cc720e4d2b4197774f640
5b5cc720e4d2b4197774f640- 111false
- 27false
- 39true
- 413false
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Answer : 3. "9"
Explanation :
Answer: C) 9 Explanation: Here the number of cogs is inveresly proportional to number of revolutions => More cogs less revolution=> 6 : 14 :: x : 21=> (21x6)/14 = 9
Q: Covalent bonds hold atoms together because they 1855 05b5cc619e4d2b4197774b73e
5b5cc619e4d2b4197774b73e- 1fill shells without giving atoms much chargefalse
- 2bring electrons closer to protonsfalse
- 3Both A & Btrue
- 4use forces between nuclei as well as forces between electronsfalse
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Answer : 3. "Both A & B"
Explanation :
Answer: C) Both A & B Explanation: Covalent bonds hold atoms together because the attraction between the positively charged nuclei and the negatively charged shared electrons is greater than the repulsions between the nuclei themselves.

