IIT JEE Practice Question and Answer
8Q: Which of these is an example of negative feedback? 1528 05b5cc62ce4d2b4197774b93e
5b5cc62ce4d2b4197774b93e- 1After you eat, insulin stimulates the lowering of blood sugar levels.true
- 2Once labor begins, contractions increase in frequency and intensity.false
- 3After you eat, glucagon stimulates an increase in blood sugar levels.false
- 4As a blood clot begins to form, the process of its formation gets faster and faster.false
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Answer : 1. "After you eat, insulin stimulates the lowering of blood sugar levels."
Explanation :
Answer: A) After you eat, insulin stimulates the lowering of blood sugar levels. Explanation: Eating raises blood sugar levels, insulin stimulates the lowering of blood sugar level. In this example the response to the stimulus (increased blood sugar levels) opposes that stimulus (by lowering blood sugar levels).
Q: Which of these was a political goal for farmers? 7276 05b5cc62ce4d2b4197774b938
5b5cc62ce4d2b4197774b938- 1lower prices for grain storagetrue
- 2higher prices for machineryfalse
- 3lower prices for foreign goodsfalse
- 4higher prices for shippingfalse
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Answer : 1. "lower prices for grain storage"
Explanation :
Answer: A) lower prices for grain storage Explanation:
Q: Which statement best describes the electronegativity of an element? 1729 05b5cc62ce4d2b4197774b92e
5b5cc62ce4d2b4197774b92e- 1Electronegativity of an atom is it's ability to produce energy while losing an electron.false
- 2Electronegativity of an atom is it's ability to attract electrons during bond formation.true
- 3Electronegativity of an atom is it's ability to lose electrons during cation formation.false
- 4Electronegativity of an atom is it's ability to share electrons during a covalent bond formation.false
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Answer : 2. "Electronegativity of an atom is it's ability to attract electrons during bond formation."
Explanation :
Answer: B) Electronegativity of an atom is it's ability to attract electrons during bond formation. Explanation: Electronegativity, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons (or electron density) towards itself.
Q: How long is a term in the house of representatives? 964 05b5cc62ce4d2b4197774b933
5b5cc62ce4d2b4197774b933- 15false
- 22true
- 34false
- 46false
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Answer : 2. "2"
Explanation :
Answer: B) 2 Explanation: Members of the House of Representatives serve two-year terms and are considered for reelection every even year.
Q: What organelle is responsible for photosynthesis? 969 05b5cc62ce4d2b4197774b929
5b5cc62ce4d2b4197774b929- 1mitochondriafalse
- 2Cytoplasmfalse
- 3Chloroplaststrue
- 4Ribosomesfalse
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Answer : 3. "Chloroplasts"
Explanation :
Answer: C) Chloroplasts Explanation: Chloroplasts are organelles in plant and bacteria cells that contain the chlorophyll is responsible for photosynthesis.
Q: What was a major contribution of John Muir? 1074 05b5cc62ce4d2b4197774b91c
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Answer :
Explanation :
John Muir encouraged the establishment of various parks in the United States' National Park System, including the Yosemite and Sequoia National Parks.
Q: Which animal adaptation happened before the others? 1477 05b5cc62ce4d2b4197774b91d
5b5cc62ce4d2b4197774b91d- 1Reproduction on landfalse
- 2Development of a colelomfalse
- 3Tissue developmenttrue
- 4Deuterostome developmentfalse
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Answer : 3. "Tissue development"
Explanation :
Answer: C) Tissue development Explanation:
Q: Which country shares the longest border with China? 1265 05b5cc62ce4d2b4197774b917
5b5cc62ce4d2b4197774b917- 1Indiafalse
- 2Russiafalse
- 3Mongoliatrue
- 4Kazakhstanfalse
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Answer : 3. "Mongolia"
Explanation :
Answer: C) Mongolia Explanation: China shares land borders with 14 different countries, the longest being with Mongolia followed by Russia and then India.