IIT JEE Practice Question and Answer
8Q: 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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Answer : 1. "L"
Explanation :
Answer: A) L Explanation: The twentieth element in the above arrangement is 'E'.Then, the sixth element to the left of 'E' is 'L'.
Q: I have legs, but i cannot walk. Who am I? 2428 05b5cc601e4d2b4197774b485
5b5cc601e4d2b4197774b485- 1Dragon fliestrue
- 2Prawnsfalse
- 3House fliesfalse
- 4All of the abovefalse
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Answer : 1. "Dragon flies"
Explanation :
Answer: A) Dragon flies Explanation: Dragon flies have legs but they cannot walk.
Q: The resolution of a printer is measured in 2428 05b5cc626e4d2b4197774b869
5b5cc626e4d2b4197774b869- 1DPItrue
- 2Megabitsfalse
- 3Hertzfalse
- 4Inchesfalse
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Answer : 1. "DPI"
Explanation :
Answer: A) DPI Explanation: Dots per inch (DPI, or dpi) is a measure of spatial printing or video or image scanner dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm).
Q: 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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Answer : 1. "Parvovirus B19 causes severe anemia because it preferentially infects erythrocyte precursors"
Explanation :
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.
Q: 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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Answer : 3. "D) is observed on which date ?
A) June 23
B) June 22
C)"
Explanation :
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”.
Q: Jaduguda mines are famous for 2426 05b5cc6a8e4d2b4197774ce9a
5b5cc6a8e4d2b4197774ce9a- 1mica depositsfalse
- 2uranium depositstrue
- 3gold depositsfalse
- 4iron orefalse
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Answer : 2. "uranium deposits"
Explanation :
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.
Q: 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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Answer : 1. "reabsorption of excess neurotransmitter molecules by a sending neuron"
Explanation :
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.
Q: 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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Answer : 1. "2520"
Explanation :
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)