List of top Questions asked in GATE XL

Consider a diploid plant species where the cells in the epidermis (the outermost single cell layer) always divide in the anticlinal orientation. If one such cell within the central zone of the shoot apical meristem (SAM) spontaneously becomes tetraploid at the seedling stage, which one of the following cellular arrangements would be most likely observed if the meristem is examined at the adult stage?
E. coli is grown exclusively in a medium containing \(^{15}NH_4Cl\) as the sole nitrogen source. Subsequently, the cells were shifted to a medium containing \(^{14}NH_4Cl\). The molar ratio of hybrid DNA (\(^{15}N-^{14}N\)) to light DNA (\(^{14}N-^{14}N\)) after four generations (rounded off to two decimal places) will be .......
Which one of the following mature cell types is live but usually lacks nucleus?
Which one of the following commercially important carbohydrates is naturally produced only by the members of the plant kingdom?
Which one of the following agents causes the necrotic ring spot disease in stone fruits?
Förster Resonance Energy Transfer does NOT depend on the
Peptide-binding cleft in MHC-I is formed by
Which of the following peptides do/does NOT absorb ultraviolet light above 250 nm wavelength?
Which of the following is/are peptide hormone(s)?
Which of the following is/are heteropolysaccharide(s)?
The equilibrium dissociation constant of acetic acid is \( 1.74 \times 10^{-5} \) M. The \( pK_a \) of acetic acid (rounded off to one decimal place) is ......
Which one of the following restriction endonucleases is a blunt cutter?
Which one of the following DNA repair systems requires DNA glycosylases?
Which one of the following is the most sensitive immunoassay?
Which of the following statements about antibodies is/are correct?
Which one of the following molecules does NOT contain phosphoanhydride bond(s)?
For an enzyme that follows Michaelis-Menten kinetics, a competitive inhibitor
Energy of the transition from \( n_h = 4 \) to \( n_l = 2 \) for hydrogen atom is \( E \times 10^3 \) cm\(^{-1}\).
Given: Rydberg constant for hydrogen: \( 1.097 \times 10^7 \, {m}^{-1} \)
Value of E is ............... (rounded off to two decimal places)
A non-volatile solute has a molecular weight of 180 g mol\(^{-1}\). Assume that the solute does not associate or dissociate in water, and the boiling-point constant (ebullioscopic constant) of water is 0.51 K kg mol\(^{-1}\).
The amount (in g) of solute added to 500 g of water to elevate the boiling point by 0.153 K is ............... (answer in integer)
The standard potentials (\( E^\circ \)) for the Fe\(^{3+}\)/Fe and Fe\(^{3+}\)/Fe\(^{2+}\) couples are -0.04 V and +0.76 V, respectively.
Given: Faraday constant = 96500 C mol\(^{-1}\)
The value for \( E^\circ \) (Fe\(^{2+}\)/Fe) in V is ............... (rounded off to two decimal places)
Zinc is essential for the function of
Which one of the following molecules captures \(CO_2\) in the \(CO_4\) cycle?
Which one of the following methods separates biomolecules based on their hydrodynamic volumes?
Consider the two \( pK_a \) values of valine as 2.32 and 9.62. The isoelectric point (pI) of this amino acid is ....... (rounded off to two decimal places)
The bond order in \( N_2^{2-} \) species is: