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Questions without an upvoted answer in Biochemistry

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GATE BT 2026 | Question: 6
Which of the following enzyme is involved in the protection of cells from reactive oxygen species?HexokinaseGlucose $6$-phosphate dehydrogenaseEnolasePyruvate kinase
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GATE BT 2026 | Question: 11
The catalytic efficiency of an enzyme following Michaelis-Menten kinetics is defined by$k_{\text {Cat }}$$V_{\max } / k_{\mathrm{Cat}}$$k_{\text {Cat }} / K_{\mathrm{M}}$...
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GATE BT 2026 | Question: 13
Match the carbohydrates in Column $\text{I}$ with the correct glycosidic linkages involved in Column $\text{II}$.\[\begin{array}{|l|l|}\hline\text{Column I} & \text{Colum...
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GATE BT 2026 | Question: 22
You are characterizing a new enzyme isolated and purified in the laboratory. If the maximum velocity of the enzyme is $1800 ~\mu$ moles $\mathrm{L}^{-1} \mathrm{~min}^{-1...
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GATE BT 2026 | Question: 30
By elemental analysis of a biomass sample, it was found that the cells in the given sample are composed of (by weight) $\mathrm{C}=50 \%, \mathrm{H}=8 \%, \mathrm{O}=20 \...
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GATE BT 2025 | Question: 7
​​​​Which one of the following coenzymes is utilised by alanine racemase for the conversion of $L$-Alanine to $D$-Alanine?Pyridoxal phosphateThiamine pyrophosphateTetrahy...
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GATE BT 2025 | Question: 8
​​​​​Correctly match the following Monosaccharides with their respective Epimers. Monosaccharide EpimerP.$D$- mannose1.$C-3$ epimer of $D$-glucoseQ.$D$-allose2.$C-4$ epim...
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GATE BT 2025 | Question: 14
​​Which of the following show(s) optical activity at $100 \: \mathrm{mM}$ concentration in water?Solution of NaClSolution of D-GlucoseSolution of GlycineSolution of L-Pro...
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GATE BT 2025 | Question: 16
​​​Which of the following compounds have the same degree of reduction per carbon-mole?GlucoseLactic acidAcetic acidFormic acid
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GATE BT 2025 | Question: 27
Correctly match the Inhibitor with its respective Function in mitochondrial respiration.\[\begin{array}{|l|}\hline\begin{array}{l|l}\textbf{Inhibitor} & \textbf{Function}...
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GATE BT 2025 | Question: 31
​​​​Correctly match the Coenzyme with its respective involvement in a specific Reaction type.\begin{array}{|l|l|}\hline \textbf{Coenzyme } & \textbf{Reaction type} \\\hli...
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GATE BT 2025 | Question: 39
​​​​​Which of the following statements is/are true regarding the effect of the concentration of metabolic intermediates on glycolysis in erythrocytes?Increased AMP levels...
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GATE BT 2025 | Question: 46
​​​​​Which of the following amino acids contain(s) two chiral carbons?L-LeucineL-ThreonineL-IsoleucineL-Asparagine
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The degree of reduction of lactic acid (C3H6O3) is ________________.
The degree of reduction of lactic acid (C3H6O3) is ________________.
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GATE BT 2024 | Question: 15
Krebs $\text{(TCA)}$ cycle is $\_\_\_\_\_\_$ pathway.only an anaboliconly a catabolic an amphibolica pyogenic
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GATE BT 2024 | Question: 27
Match the industrial enzyme (Column I) with its application (Column II).\begin{array}{|c|c|c|}\hline \text{Column I} & \text{Column II} \\\hline \text{P. Lipase} & 1. \...
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GATE BT 2024 | GA | Question: 8
The pie chart presents the percentage contribution of different macronutrients to a typical $2,000$ $\mathrm{kcal}$ diet of a person.The typical energy density $(\mathrm{...
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GATE BT 2023 | Question: 44
An enzyme (E) catalyzes the biochemical reaction $A \rightarrow B$ with $k_{c a t}$ equal to $500 s^{-1}$. If the initial reaction velocity $\left(V_{0}\right)$ is $10 \m...
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GATE BT 2022 | Question: 9
Which of the following statements about reversible enzyme inhibitors are $\text{CORRECT}?$Uncompetitive inhibitors bind only to the enzyme-substrate complexNon-competitiv...
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GATE BT 2022 | Question: 12
Terpenoids are made of _________ units.amino acidcarbohydrateisoprenetriacylglycerol
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GATE BT 2021 | Question: 14
A protein without its prosthetic group is known asapoproteinhemoproteinholoproteinlipoprotein
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GATE BT 2021 | Question: 37
Which of the following chemical messenger(s) is/are derivative(s) of tryptophan?$\gamma$-amino butyric acidIndole acetic acidMelatoninSerotonin
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GATE2019: 23
The degree of reduction for acetic acid $\left ( C_{2} H_{4}O_{2}\right )$ is ____________.
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GATE2019: 26
In general, which one of the following statements is $NOT \;CORRECT$?Hydrogen bonds result from electrostatic interactionsHydrogen bonds contribute to the folding energy ...
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GATE2019: 37
Which one of the following amino acid residues will destabilize an $\alpha$-helix when inserted in the middle of the helix?ProVallIeLeu
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GATE2020: 39
Which of the following strategies are used by cells for metabolic regulation?Phosphorylation-dephosphorylationAllosteryFeedback inhibition$P$ and $Q$ only$P$ and $R$ only...
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GATE2020: 55
The mitochondrial electron transfer chain oxidizes $NADH$ with oxygen being the terminal electron acceptor. The redox potentials for the two half-reactions are given belo...
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GATE2020: 6
Vincristine and vinblastine, two commercially important secondary metabolites from $Catharanthus\; roseus$, are examples ofalkaloidsflavonoidsterpenoidssteroids
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GATE2020: 19
The elemental composition of dry biomass of a yeast species is $CH_{1.6}O_{0.4}N_{0.2}S_{0.0024}P_{0.017}$. The contribution of carbon to the dry biomass is _________ $\%...
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GATE2019: 14
Which one of the following statements is $CORRECT$ for enzyme catalyzed reactions? ( $\Delta G$ is Gibbs free energy change, $K_{eq}$ is equilibrium constant)Enzymes affe...
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GATE2016-10
Disaccharide molecules that contain $\beta( 1 –\blacktriangleright 4)$ glycosidic linkage aresucrose and maltosesucrose and isomaltosemaltose and isomaltoselactose and ce...
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GATE2016-14
Which one of the following statements is NOT true?In competitive inhibition, substrate and inhibitor compete for the same active site of an enzymeAddition of a large amou...
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GATE BT 2017 | Question: 1
An enzyme catalyzes a reaction bydecreasing the energy of the substrate.decreasing the activation energy of the reaction.decreasing product stability.increasing the activ...
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GATE BT 2017 | Question: 2
Natural proteins are composed primarily of $20$ $\alpha$-amino acids. Which one of the following statements is true for any of these amino acids in a solution of pH $1.5$...
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GATE BT 2017 | Question: 21
An enzymatic reaction exhibits Michaelis-Menten kinetics. For this reaction, on doubling the concentration of enzyme while maintaining $[S]>>[E_0]$both $K_m$ and $V_{\tex...
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GATE BT 2017 | Question: 32
Which one of the following amino acids has three ionizable groups?GlycineLeucineValineLysine
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GATE BT 2017 | Question: 46
If the chemical composition of proteins in an organism is $CH_{1.5}O_{0.3}N_{0.3}S_{0.004}$, the mass percentage of carbon in the protein is __________Given data: Atomic ...
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GATE BT 2015 | Question: 20
Which one of the following amino acids has the highest probability to be found on the surface of a typical globular protein in aqueous environment?AlaValArgIle
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GATE BT 2015 | Question: 28
How many $3$-tuples are possible for the following amino acid sequence?MADCMWDISEASE$4$$5$$11$$12$
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GATE BT 2015 | Question: 29
How many different protein sequences of $100$ residues can be generated using $20$ standard amino acids?$100^{20}$$100 \times 20$$20^{100}$$100! \times 20!$
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