GATE BT purpose:exam-prep PYQs & Answers — Page 26 — Exam Papers

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Questions 251–260 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 26 of 65

If 100 bp of a double-helical DNA weighs 1×10

gm and distance between two bp is 0.34 nm, the total amount of DNA (in mg, rounded off to one decimal place) required to stretch from Earth to Moon (assuming the distance between Earth and Moon to be 3,74,000 km) is __________.

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A protein has three identical sites arranged at the vertices of an equilateral triangle. If one site is filled with a dye (donor), the measured quantum yield (

) is 0.5. Filling one site with a donor dye and a second site with an acceptor dye results in

of 0.25. The measured

of one site filled with donor and the other two sites filled with acceptor dye (rounded off to three decimal places) is __________.

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If

, the value of

is __________.

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If

, the value of

at

is __________.

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If f(2) = 5 and (f(x))(f(x+1)) = 3 for all real values of x, the value of f(10) is __________.

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Ten playing cards numbered 1, 2, 3, ..., 10 are placed face down on a table. One card is drawn at random, its number recorded, and then replaced face down. A card is drawn again at random. The probability that the number on the second draw is greater than the number on the first draw (rounded off to two decimal places) is __________.

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The values of the consistency index ‘K’ and the flow behavior index ‘n’ of a dilatant fluid are 0.415 (in CGS units) and 1.23, respectively. The value of the apparent viscosity (in

) of this fluid at a shear rate of

(rounded off to the nearest integer) is ____________.

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An evaporator is insulated using glass wool material of 0.15 m thickness. The inner most surface and the outer surface of the insulation are at 700 °C and 80 °C, respectively. The mean thermal conductivity of the glass wool under these conditions is 0.29 W m

K

. The rate of heat loss (in W) through 1.2 m

of the evaporator wall surface (rounded off to the nearest integer) is ____________.

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A proportional controller is used to control the temperature of an autoclave from 60 °C to 130 °C. If the proportional band setting of the controller is 25%, the proportional gain value is ____________.

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A dNTP master-mix is prepared by combining 40 μL of each 20 mM dNTP stock (dATP, dCTP, dGTP and dTTP). 4 μL of this dNTP master-mix is added to a PCR mix and the final volume is adjusted to 50 μL. The concentration (in μM) of total dNTPs in the PCR mix is ____________.

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