Life Sciences
GATE XL format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 161–170 of 812. Imported answers require independent review unless marked reviewed.
Question 15
Open questionXL-PMCQ1 markNeeds review
The molecules A and B are a pair of ____________.
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Open questionXL-PMCQ2 marksNeeds review
Each of the following alkenes undergoes addition reaction with bromine. Under the same reaction conditions, the CORRECT trend in the reaction rates is
Structures I, II and III are shown.
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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 mol⁻¹ dm³ s and a slope of 2.10 s. The CORRECT Michaelis constant for the reaction is ______ (rounded off to 2 decimal places).
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Which one among the following structures is the most stable conformer of (Z)-pent-2-ene?
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Which one of the following pairs of amino acids is NOT incorporated in a polypeptide chain?
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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
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Which one of the following metabolic intermediates is common to glycolysis, nucleotide synthesis and glycogen synthesis?
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In mammals, hematopoietic stem cells that give rise to different types of blood cells are known as
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Open questionXL-QMCQ2 marksNeeds review
Metabolic intermediates provide the backbone for the synthesis of amino acids. Match the metabolic intermediates listed in Column I with their corresponding amino acids given in Column II.
Column I | Column II |
|---|---|
P. α-Ketoglutarate | i. Histidine |
Q. Ribose 5-phosphate | ii. Glutamate |
R. 3-Phosphoglycerate | iii. Aspartate |
S. Phosphoenolpyruvate | iv. Phenylalanine |
| v. Serine |
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Open questionXL-QMCQ2 marksNeeds review
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?
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
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