IISER IAT 2023 question paper

1. A.
   P - (iii); Q - (i); R - (iv); S - (ii)
2. B.
   P - (i); Q - (ii); R - (iii); S - (iv)
3. C.
   P - (iv); Q - (iii); R - (ii); S - (i)
4. D.
   P - (ii); Q - (iv); R - (i); S - (iii)

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1. A.
   Zymogen form of pepsin
2. B.
   Activated form of pepsin
3. C.
   An intestinal mixture of proteins, mucous and $\mathrm{HCO_3^-}$
4. D.
   Partially digested proteins

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1. A.
   P - (iv); Q - (ii); R - (i); S - (iii)
2. B.
   P - (i); Q - (iii); R - (ii); S - (iv)
3. C.
   P - (ii); Q - (iv); R - (iii); S - (i)
4. D.
   P - (iii); Q - (i); R - (iv); S - (ii)

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1. A.
   Prophase
2. B.
   Telophase
3. C.
   Anaphase
4. D.
   Metaphase

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1. A.
   The endosperm is not present in some of the mature dicot seeds.
2. B.
   In dicots, the outer layer of the seed coat is called testa.
3. C.
   In monocot seeds, the membraneous seed coat that is fused with the fruit wall is called the aleurone layer.
4. D.
   Coleoptile and coleorhiza are found in monocotyledonous seeds.

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1. A.
   Spring wood and late wood.
2. B.
   Heart wood and sap wood.
3. C.
   Autumn wood and sap wood.
4. D.
   Spring wood and heart wood.

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1. A.
   The catalytic redox center of Nitrogenase contains Mo and Fe as cofactors.
2. B.
   Nitrogenase can function optimally only in the presence of molecular oxygen.
3. C.
   The transport of important amides, like asparagine and glutamine, produced by transamination, to different parts of the plant body is mediated by phloem.
4. D.
   Atmospheric nitrogen is fixed by Nitrogenase by converting $\mathrm{N_2}$ to $\mathrm{NO_3^-}$.

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1. A.
   Variation in the potency and concentration of reserpine produced by Rauwolfia vomitoria.
2. B.
   The greater diversity of plant species found in India compared to Central Asia.
3. C.
   Greater variation of ecosystems found in India than in Scandinavia.
4. D.
   Higher diversity of amphibians in the Western Ghats than in the Eastern Ghats.

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1. A.
   Sigma factor.
2. B.
   Termination factor.
3. C.
   Release factor.
4. D.
   Rho factor.

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1. A.
   P - (i); Q - (iv); R - (iii); S - (v)
2. B.
   P - (iv); Q - (v); R - (i); S - (ii)
3. C.
   P - (iii); Q - (ii); R - (v); S - (iv)
4. D.
   P - (v); Q - (i); R - (iv); S - (iii)

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1. A.
   Typhoid
2. B.
   Pertussis
3. C.
   Malaria
4. D.
   Tuberculosis

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1. A.
   S, T
2. B.
   R, T
3. C.
   Q, R
4. D.
   P, S

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1. A.
   9996
2. B.
   4
3. C.
   9608
4. D.
   392

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1. A.
   Lane 1: bands at 2600 and 1900; Lane 2: bands at 1900, 1100, 600, 500 and 400
2. B.
   Lane 1: bands at 1900, 1700 and 900; Lane 2: bands at 1900, 1100, 600, 500 and 400
3. C.
   Lane 1: bands at 1900, 1700, 500 and 400; Lane 2: bands at 1900, 1100, 900 and 600
4. D.
   Lane 1: bands at 1900, 1700 and 900; Lane 2: bands at 1900, 1700, 500 and 400

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1. A.
   Autosomal recessive, homozygous for the normal allele
2. B.
   X-linked recessive, heterozygous
3. C.
   Autosomal recessive, heterozygous
4. D.
   Autosomal dominant, homozygous for the normal allele

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1. A.
   3
2. B.
   1
3. C.
   0
4. D.
   2

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1. A.
   $\mathrm{F_2}$, $\mathrm{N_2}$, and $\mathrm{B_2}$
2. B.
   $\mathrm{O_2}$, $\mathrm{B_2}$, and $\mathrm{N_2}$
3. C.
   $\mathrm{O_2}$ and $\mathrm{F_2}$
4. D.
   $\mathrm{O_2}$ and $\mathrm{B_2}$

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1. A.
   $109^\circ$
2. B.
   $120^\circ$
3. C.
   $60^\circ$
4. D.
   $45^\circ$

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1. A.
   Bauxite
2. B.
   Malachite
3. C.
   Quartz
4. D.
   Siderite

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1. A.
   $\Delta_r \mathrm{G}^\circ$ vs T
2. B.
   $\Delta_r \mathrm{S}^\circ$ vs T
3. C.
   $\Delta_r \mathrm{S}^\circ$ vs P
4. D.
   $\Delta_r \mathrm{H}^\circ$ vs T

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1. A.
   II and IV
2. B.
   II and III
3. C.
   I and III
4. D.
   I and IV

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1. A.
   II
2. B.
   III
3. C.
   IV
4. D.
   I

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1. A.
   II and IV
2. B.
   I and II
3. C.
   II and III
4. D.
   I and IV

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1. A.
   II
2. B.
   IV
3. C.
   I
4. D.
   III

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1. A.
   I and III
2. B.
   I and II
3. C.
   III and IV
4. D.
   II and IV

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1. A.
   Solids and liquids have definite volume.
2. B.
   Due to the absence of electron-nuclear attraction in solids and liquids.
3. C.
   Molecules are closer to each other in solids and liquids.
4. D.
   Due to the presence of electron-nuclear attraction in solids and liquids.

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1. A.
   It is used for the adsorption of both gases and solutions.
2. B.
   The Freundlich adsorption isotherm equation is an empirical equation.
3. C.
   The value of $\frac{1}{n}$ is between 0 and 1.
4. D.
   It holds good over a wide range of pressures.

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1. A.
   Mean C-H bond enthalpies differ slightly from compound to compound.
2. B.
   All four C-H bonds in $\mathrm{CH_4}$ are identical in bond length and energy.
3. C.
   $\Delta_a H^0$ is the mean bond enthalpy of a C-H bond.
4. D.
   The energy required to break individual C-H bonds in successive steps is different.

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1. A.
   Positive deviation and no deviation (ideal behaviour), respectively.
2. B.
   Negative deviation and positive deviation, respectively.
3. C.
   Positive deviation and negative deviation, respectively.
4. D.
   No deviation (ideal behaviour) and negative deviation, respectively.

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1. A.
   $\mathrm{H_3O_2^+}$
2. B.
   $\mathrm{H_7O_4^+}$
3. C.
   $\mathrm{H_9O_4^+}$
4. D.
   $\mathrm{H_5O_3^+}$

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1. A.
   $(12f(0), 14f(0))$
2. B.
   $(8f(0), 10f(0))$
3. C.
   $(0, 2f(0))$
4. D.
   $(4f(0), 6f(0))$

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1. A.
   $2$
2. B.
   $3$
3. C.
   $0$
4. D.
   $1$

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1. A.
   Circle
2. B.
   Hyperbola
3. C.
   Parabola
4. D.
   Line

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1. A.
   Two
2. B.
   Four
3. C.
   Zero
4. D.
   One

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1. A.
   $-1$
2. B.
   $1$
3. C.
   $-3$
4. D.
   $3$

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1. A.
   $435$
2. B.
   $30$
3. C.
   $100$
4. D.
   $200$

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1. A.
   $\frac{3}{\sqrt{10}}\sigma$
2. B.
   $\frac{9}{10}\sigma$
3. C.
   $\frac{\sqrt{10}}{3}\sigma$
4. D.
   $\frac{10}{9}\sigma$

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1. A.
   $\frac{2}{9}$
2. B.
   $\frac{4}{9}$
3. C.
   $\frac{1}{4}$
4. D.
   $\frac{1}{9}$

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1. A.
   $y\frac{d^2y}{dx^2} + e^x\frac{dy}{dx} + y^2 = e^{x}$
2. B.
   $y\frac{d^2y}{dx^2} + e^x\frac{dy}{dx} + y^2 = e^{2x}$
3. C.
   $y\frac{d^2y}{dx^2} - e^x\frac{dy}{dx} + y^2 = e^{x}$
4. D.
   $y\frac{d^2y}{dx^2} - e^x\frac{dy}{dx} + y^2 = e^{2x}$

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1. A.
   $e - 1$
2. B.
   $e - 2$
3. C.
   $\frac{1}{2}(e - 1)$
4. D.
   $\frac{1}{2}e$

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1. A.
   $-5$
2. B.
   $2$
3. C.
   $-10$
4. D.
   $-2$

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1. A.
   $2$
2. B.
   $1$
3. C.
   $3$
4. D.
   $-1$

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1. A.
   $(2, 4)$
2. B.
   $(-\infty, 0)$
3. C.
   $(4, \infty)$
4. D.
   $(0, 2)$

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1. A.
   $f$ is decreasing on $\left(\frac{\pi}{4}, \frac{\pi}{2}\right)$.
2. B.
   $f$ is decreasing on $\left(\frac{\pi}{4}, \frac{\pi}{3}\right)$ and increasing on $\left(\frac{\pi}{3}, \frac{\pi}{2}\right)$.
3. C.
   $f$ is increasing on $\left(\frac{\pi}{4}, \frac{\pi}{2}\right)$.
4. D.
   $f$ is increasing on $\left(\frac{\pi}{4}, \frac{\pi}{3}\right)$ and decreasing on $\left(\frac{\pi}{3}, \frac{\pi}{2}\right)$.

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1. A.
   $\sin|x|$
2. B.
   $|x|$
3. C.
   $|x|^{\frac{1}{2}}$
4. D.
   $\cos|x|$

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1. A.
   $\frac{u^2 + v^2}{2(u + v)}$
2. B.
   $\frac{u^2 + gh}{2(u + v)}$
3. C.
   $\frac{gh}{2(u + v)}$
4. D.
   $\frac{v + u}{2}$

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1. A.
   $(1 - \eta)/\eta$
2. B.
   $\eta/(1 - \eta)$
3. C.
   $\eta$
4. D.
   $1/\eta$

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1. A.
   $16$
2. B.
   $1/2$
3. C.
   $8$
4. D.
   $4$

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1. A.
   $\frac{\nu_1}{\nu_2}$
2. B.
   $\frac{\nu_2}{\nu_1}$
3. C.
   $\frac{\nu_2 - \nu_1}{\nu_2}$
4. D.
   $\frac{\nu_2 - \nu_1}{\nu_1}$

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1. A.
   $P_2 = P_1$
2. B.
   $P_2 = P_1/4$
3. C.
   $P_2 = P_1/2$
4. D.
   $P_2 = 2P_1$

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1. A.
   $\vec{F}_\mathrm{AB} = \vec{F}_\mathrm{BA}$
2. B.
   $\vec{F}_\mathrm{AB} = 2\vec{F}_\mathrm{BA}$
3. C.
   $\vec{F}_\mathrm{AB} = -\vec{F}_\mathrm{BA}$
4. D.
   $\vec{F}_\mathrm{AB} = -2\vec{F}_\mathrm{BA}$

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1. A.
   $\frac{\pi}{\omega}$
2. B.
   $\frac{\pi}{4\omega}$
3. C.
   $0$
4. D.
   $\frac{\pi}{2\omega}$

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1. A.
   $n_e = n_h$
2. B.
   $n_h > n_h^{(0)}$
3. C.
   $n_e > n_e^{(0)}$
4. D.
   $n_e^{(0)}$ and $n_h^{(0)}$ are independent of temperature.

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1. A.
   $\frac{7\alpha T^2}{9}$
2. B.
   $\frac{8\alpha T^2}{9}$
3. C.
   $\frac{4\alpha T^2}{9}$
4. D.
   $\frac{2\alpha T^2}{9}$

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1. A.
   $\epsilon_0^{3/2}L^{1/2}$
2. B.
   $\epsilon_0^{1/2}L$
3. C.
   $\epsilon_0^{3/2}L$
4. D.
   $\epsilon_0^{1/2}L^{3/2}$

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1. A.
   $\frac{4R}{3}$
2. B.
   $\frac{R}{3}$
3. C.
   $\frac{R}{6}$
4. D.
   $\frac{2R}{3}$

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1. A.
   $v(x) = \frac{2R\sqrt{2GMR}}{x(4R - x)}$
2. B.
   $v(x) = \frac{2\sqrt{2GMR}}{x^{1/2}(4R - x)^{1/2}}$
3. C.
   $v(x) = \frac{\sqrt{GMR}}{x^{1/2}(4R - x)^{1/2}}$
4. D.
   $v(x) = \frac{6R^2\sqrt{2GMR}}{x^{3/2}(4R - x)^{3/2}}$

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1. A.
   $2r$
2. B.
   $r/2$
3. C.
   $r$
4. D.
   $\sqrt{2}r$

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1. A.
   $5$
2. B.
   $3$
3. C.
   $4$
4. D.
   $2$

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1. A.
   500 kJ
2. B.
   2500 kJ
3. C.
   2000 kJ
4. D.
   1000 kJ

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