List of top Life Science Questions asked in GATE Life Sciences

Which of the following molecules is/are second messenger(s) produced by the phosphoinositide signaling cascade?

A protein has seven cysteine residues. The maximum number of disulfide bonds of different combinations that can possibly be formed by these seven cysteine residues is ................ (in integer).

According to Hard–Soft Acid–Base (HSAB) principle, the CORRECT option(s) for the solubility trend in water is/are

The number of radial node(s) for the valence orbital of U(III) ion is _______ (in integer). (Given: Atomic number of U is 92)

Choose the CORRECT trend(s) of the first ionization energies among the following. (Given: Atomic numbers C: 6; N: 7; O: 8; F: 9; Si: 14; P: 15; S: 16; Cl: 17)

The depression of freezing point of water (in K) for 0.1 molal solutions of NaCl and Na$_2$SO$_4$ are $\Delta T_1$ and $\Delta T_2$, respectively. Assuming ideal solutions, find the ratio $\Delta T_1/\Delta T_2$ (rounded off to two decimal places).

Consider two different paths in which the volume of an ideal gas doubles isothermally: (i) Reversible expansion (work done = \( w_{\text{rev}} \))
(ii) Irreversible expansion, with the external pressure equal to the final pressure of the gas (work done = \( w_{\text{irrev}} \)) Here, \[ \dfrac{w_{\text{rev}}}{w_{\text{irrev}}} = ? \]

Which one among the following mixtures gives a buffer solution in water?

The CORRECT order of stability of the given metal oxides is