IIT JEE प्रश्न और उत्तर का अभ्यास करें
8प्र: Which of the following is the sixth to the left of the twentieth from the left end of the below arrangement ?BM%R#J@K!DF69L4*15NEP23AYQZ#7UG 2431 05b5cc758e4d2b4197774fc0a
5b5cc758e4d2b4197774fc0a- 1Ltrue
- 2Kfalse
- 34false
- 49false
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उत्तर : 1. "L"
व्याख्या :
Answer: A) L Explanation: The twentieth element in the above arrangement is 'E'.Then, the sixth element to the left of 'E' is 'L'.
प्र: प्रिंटर का रिजॉल्यूशन में मापा जाता है 2429 05b5cc626e4d2b4197774b869
5b5cc626e4d2b4197774b869- 1DPItrue
- 2Megabitsfalse
- 3Hertzfalse
- 4Inchesfalse
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उत्तर : 1. "DPI"
व्याख्या :
Answer: A) DPI व्याख्या: डॉट्स प्रति इंच (डीपीआई, या डीपीआई) स्थानिक मुद्रण या वीडियो या छवि स्कैनर डॉट घनत्व का एक माप है, विशेष रूप से व्यक्तिगत बिंदुओं की संख्या जिन्हें 1 इंच (2.54 सेमी) की अवधि के भीतर एक पंक्ति में रखा जा सकता है।
प्र: मेरे पैर हैं, लेकिन मैं चल नहीं सकता। मैं कौन हूँ? 2428 05b5cc601e4d2b4197774b485
5b5cc601e4d2b4197774b485- 1ड्रैगनफलीज़true
- 2झींगेfalse
- 3हाउसफलीज़false
- 4उपरोक्त सभीfalse
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उत्तर : 1. "ड्रैगनफलीज़"
व्याख्या :
Answer: A) Dragonflies व्याख्या: Dragonflies के पैर होते हैं लेकिन वे चल नहीं सकते।
प्र: Jaduguda mines are famous for 2427 05b5cc6a8e4d2b4197774ce9a
5b5cc6a8e4d2b4197774ce9a- 1mica depositsfalse
- 2uranium depositstrue
- 3gold depositsfalse
- 4iron orefalse
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उत्तर : 2. "uranium deposits"
व्याख्या :
Answer: B) uranium deposits Explanation: The Jaduguda Mine also known as Jadugoda or Jadugora is a Uranium mine in Jaduguda village in the Purbi Singhbhum district of the Indian state of Jharkhand.
प्र: Which of the following statements is most accurate regarding infection with parvovirus B19? 2426 05b5cc6a8e4d2b4197774ce76
5b5cc6a8e4d2b4197774ce76- 1Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursorstrue
- 2Parvovirus B19 can cause hydrops fetalis via transplacental infection of a fetus in a seropositive motherfalse
- 3Parvovirus B19 can be diagnosed by detection of viral RNA using PCR or hybridization assaysfalse
- 4Parvovirus B19 replicates in the host cell nucleus utilizing a virally encoded DNA polymerase to create a double- stranded DNA intermediatefalse
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उत्तर : 1. "Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors"
व्याख्या :
Answer: A) Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors Explanation: Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors. a. Parvovirus B19 binds preferentially to the erythrocyte blood group P antigen on erythroid precursor cells. Answers B, C, D are incorrect: b. after entry the single-stranded viral DNA genome is transported to the cell nucleus where the host DNA polymerase synthesizes the complimentary DNA strand. c. Parvovirus B19 infection can be diagnosed by direct detection of viral DNA not RNA. d. the fetus of a seropositive mother is protected from infection by maternal circulating antibodies.
प्र: The 2017 World Hydrography Day (WHD) is observed on which date ? 2426 05b5cc6d4e4d2b4197774e578
5b5cc6d4e4d2b4197774e578- 1June 23false
- 2June 22false
- 3D) is observed on which date ? A) June 23 B) June 22 C)true
- 4is observed on which date ? A) June 23 B) June 22 C) June 21 D) June 20false
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उत्तर : 3. "D) is observed on which date ?
A) June 23
B) June 22
C)"
व्याख्या :
Answer: C) June 21 Explanation: The World Hydrography Day (WHD) is observed every year on June 21 to publicise the work of hydrographers and to create awareness about hydrography which is an essential science before undertaking any activity on or under the sea. The 2017 theme is “Mapping our seas, oceans and waterways – more important than ever”.
प्र: Reuptake refers to the 2424 05b5cc636e4d2b4197774ba24
5b5cc636e4d2b4197774ba24- 1reabsorption of excess neurotransmitter molecules by a sending neurontrue
- 2release of hormones into the bloodstreamfalse
- 3movement of neurotransmitter molecules across a synaptic gapfalse
- 4inflow of myelin through an axon membranefalse
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उत्तर : 1. "reabsorption of excess neurotransmitter molecules by a sending neuron"
व्याख्या :
Answer: A) reabsorption of excess neurotransmitter molecules by a sending neuron Explanation: Reuptake refers to the process in the brain of neurons to retrieve chemicals that were not received by the next neuron. Neurons are cells in the brain that have miniscule spaces between them. They communicate with each other by sending chemicals across the space to the next neuron.
प्र: The number of ways that 8 beads of different colours be strung as a necklace is 2424 05b5cc7b4e4d2b4197775089c
5b5cc7b4e4d2b4197775089c- 12520true
- 22880false
- 34320false
- 45040false
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उत्तर : 1. "2520"
व्याख्या :
Answer: A) 2520 Explanation: The number of ways of arranging n beads in a necklace is (n-1)!2=(8-1)!2=7!2 = 2520 (since n = 8)