List of top Questions asked in GATE XL

Which of the following plant diseases is/are caused by nematode?

Which of the following selectable marker genes is/are used for herbicide tolerance during genetic transformation of plants?

Which of the following statements is/are CORRECT with reference to rubber production from plants?

In Calvin-Benson cycle, to produce 1 molecule of glyceraldehyde 3-phosphate by fixing 3 molecules of carbon dioxide, 9 molecules of ATP and____ molecules (in integer) of NADPH are typically utilized.

Which of the following tissue types is/are established during embryogenesis in wild-type Arabidopsis thaliana?

Factor H, a complement regulatory protein in plasma, binds C3b and

In Michaelis-Menten's equation, if \([S] = 15 K_m\), then the ratio \( v_0/V_{max} \) is ____ (Round off to three decimal places).

A 5250 base-pair long plasmid with 10 negative supercoils would have a linking number of______,considering 10.5 base pairs per turn for B DNA. (Answer in integer)

The spectrum of a protein obtained using electrospray ionization mass spectrometry (ESI-MS) is shown below. Two peaks, one at m/z = 2960.6 and the other at m/z = 3552.5, are marked. The mass of the protein associated with the m/z = 2960.6 peak is____ Da. (Round off to two decimal places)

Which one of the following plant families does apple (Malus domestica) belong to?

The collateral and open type of vascular bundle with endarch xylem strand is usually found in

Which one or more of the following statements correctly describe(s) fluorescence spectroscopy?

Which one or more of the following statements is/are correct in the processing of pre-mRNA in eukaryotes?

Which one or more of the following statements correctly describe(s) the changes upon the addition of puromycin during eukaryotic translation?

In a lactic acid solution at pH 4.8, the concentrations of lactic acid and lactate are 0.01 M and 0.087 M, respectively. The calculated pKa of lactic acid is____ (Round off to one decimal place)

If a 10 mM solution of a biomolecule in a cuvette with a path length of 10 mm absorbs 90% of the incident light at 280 nm, the molar extinction coefficient of the biomolecule at this wavelength is ____ M\(^{-1}\)cm\(^{-1}\). (Round off to two decimal places)

Match the metabolic intermediates listed in Column I with their corresponding amino acids given in Column II.

Column I	Column II
P. a-Ketoglutarate	i. Histidine
Q.Ribose 5-phosphate	ii. Glutamate
R. 3-Phosphoglycerate	iii.Aspartate
S. Phosphoenolpyruvate	iv. Phenylalanine
	v.Serine

Which one of the following is the correct match between the molecular properties listed in Column I and the corresponding biochemical separation methods in Column II?I.

Column I	Column II
P. Solubility	i. Reverse phase chromatography
Q. Ionic charge	ii. Ultracentrifugation
R. Polarity	iii. Salting out
S. Molecular size	iv. Isoelectric focusing
	v. Gel electrophoresis

Which one or more of the following statements is/are correct regarding the electromotive force generated by electron transfer chain?

Which one of the following pairs of amino acids is NOT incorporated in a polypeptide chain?

Mammalian cells cultured at low temperature (25 to 30 °C) leads to an increased sterol content in the membrane. Elevated sterols in the membrane results in

Which one of the following metabolic intermediates is common to glycolysis, nucleotide synthesis and glycogen synthesis?

In mammals, hematopoietic stem cells that give rise to different types of blood cells are known as

Which one or more of the following statements correctly describe(s) the addition of N-nucleotides during the rearrangement of the immunoglobulin heavy chain- encoding gene?

An enzyme-catalyzed conversion of a substrate at 298 K proceeds by a Michaelis-Menten mechanism. The Lineweaver-Burk plot for the analysis of the experimental data has an intercept along the y-axis of 0.357 mmol\(^{-1}\) dm\(^{3}\) s and a slope of 2.10 s. The correct Michaelis constant for the reaction is ______ (rounded off to 2 decimal places).