GATE XL format:nat PYQs & Answers — Exam Papers

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–10 of 244. Imported answers require independent review unless marked reviewed.

Topic practice 244 questionsPage 1 of 25

The total number of distinct stereoisomers for the following compound is ________ (in integer).

Diagram for Life Sciences question 17

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For the reaction A → products, the half-life is independent of the initial concentration of A.

The order of the reaction is ______________ (in integer).

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Among the following, the number of molecules possessing one or more lone pairs on the central atom is ______________ (in integer).

BeCl₂ SnCl₂ BF₃ NH₃ SF₄ PF₅ and SF₆

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The

of

M HCl (aq.) is __________ (rounded off to two decimal places). Given,

.

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A 25 amino acid α-helical protein is spanning the thickness of a mammalian cell membrane. Using the average dimensional parameters of a typical α-helix, the thickness of the membrane will be _____ Å (rounded off to one decimal place).

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The oxidative phase of the hexose monophosphate pathway generates __________ moles of NADPH per mole of glucose 6-phosphate (answer in integer).

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Partial double digestion of the DNA shown below with EcoRI, and XhoI will yield _____ bands after gel electrophoresis (answer in integer).

Diagram for Life Sciences question 35

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To a

solution of a receptor, its specific ligand was added, and incubated. At equilibrium, the concentration of the free ligand was

, and the concentration of the receptor-ligand complex was

. The dissociation constant for the receptor-ligand interaction is ________

(rounded off to two decimal places).

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Assuming that there are

cell in the human body, and that ATP is turning over at a rate of

ATP molecules per minute in each cell, then the human body is utilizing ______ watts (rounded off to two decimal places).

[Assume that hydrolysis of ATP yields 12 kcal per mole. 1 watt = 1 joule/sec, 1 calorie = 4.18 joules, Avogadro’s number =

]

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A solution shows a transmittance of 20% when taken in a cuvette of 2.5 cm path length. If the molar absorption coefficient of the solution is 1200 dm³/mol.cm, the concentration of the solution is _____ × 10⁵ mol/dm³ (rounded off to two decimal places).

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