During glycolysis in plants, alanine and related amino acids are directly produced from which one of the following precursors? (1) 3-Phosphoglycerate (2) Phosphoenolpyruvate (3) Pyruvate (4) Acetyl-CoA Amino acid biosynthesis […]
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CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Physiological Significance of Liver Alcohol Dehydrogenase (L-ADH) in Mammals Beyond Fermentation
In yeast, under anaerobic conditions, pyruvate is fermented to ethanol through two steps: decarboxylation of pyruvate to acetaldehyde and NADH-mediated reduction of acetaldehyde to ethanol. The mammalian liver also expresses […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
How Yeast Converts Acetaldehyde to Ethanol: The Role of NAD+ Regeneration in Fermentation
When yeast produce ethanol from glucose, the reaction of acetaldehyde to form ethanol directly (1) generates ATP (2) produces NADH (3) regenerates NAD+ (4) contributes to the proton motive force […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
The End Product of Glycolysis in Mature Erythrocytes: Understanding Lactate Formation
In mature erythrocytes, the end-product of glycolysis that contains the carbons of glucose is: (1) ethanol (2) pyruvate (3) acetaldehyde (4) lactate Mature erythrocytes (red blood cells) have a unique […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
The Major Role of 2,3-Bisphosphoglycerate (2,3-BPG) in Red Blood Cells: Regulating Hemoglobin’s Oxygen Affinity
The major role of 2,3 BPG formed during glycolysis in RBC is for hemoglobin is (1) Increasing affinity for oxygen (2) Decreasing affinity for oxygen (3) Increasing affinity for CO2 […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
The Role of Bisphosphoglycerate Mutase in Erythrocyte Glycolysis: Bypassing ATP Formation Steps
9. Which one of the following enzymes present in erythrocytes helps bypass the first step of ATP formation in glycolysis? (1) Bisphosphoglycerate mutase (2) Phosphoglycerate kinase (3) Glyceraldehyde 3-phosphate dehydrogenase […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Allosteric Regulation of Pyruvate Kinase: Understanding Key Activators and Inhibitors
The following are the statements about pyruvate kinase (PK). A. ATP is an allosteric inhibitor of PK B. Fructose 1,6 bisphosphate is an activator of PK C. ADP is an […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Effect of Mutation Causing Loss of ATP Allosteric Inhibition on Phosphofructokinase-1 (PFK-1) Activity
Which one of the following correctly describes the effect of a mutation in phosphofructokinase (PFK), that leads only to the loss of allosteric regulation by ATP? (1) Decrease in the […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
How ATP Allosterically Inhibits Phosphofructokinase-1 (PFK-1): Key Insights into Glycolysis Regulation
Phosopho fructokinase-l (PFK-1) is allosterically inhibited by (1) ATP (2) ADP (3) AMP (4) Fructose-6-P Phosphofructokinase-1 (PFK-1) is a pivotal enzyme in the glycolytic pathway, often described as the “rate-limiting” […]
CSIR NET Life Science Previous Year Questions and Solution on Biochemistry
Understanding Key Biochemical Statements: TCA Cycle, Amino Acids, and Metabolic Pathways Explained
Given below are statements that may or may not be correct. A. Fructose 2, 6- biphosphate is an allosteric inhibitor of phosphofructokinase-l. B. The TCA cycle intermediates, succinate and oxaloacetate […]
