Revise the essential concepts of carbohydrate metabolism with this comprehensive set of multiple-choice questions spanning all major pathways—glycolysis, gluconeogenesis, TCA cycle, glycogen metabolism, and the pentose phosphate pathway. Ideal for USMLE prep and biochemistry exams, this resource offers rapid revision with clear explanations for each answer.
Q.1 – A 12-year-old boy develops convulsions. After an Electroencephalogram (EEG), a neurologist determines that the child has epilepsy. He is started on benzodiazepine, which promotes the activity of GABA. GABA is derived from Glutamate by which of the following reactions?A) DeaminationB) DecarboxylationC) DehydrogenationD) HydroxylationE) TransaminationAnswer: B) DecarboxylationExplanation: GABA (gamma-aminobutyric acid) is synthesized from glutamate
Amino Acid Metabolism- Set 2- Multiple-Choice Questions Read More »
A 6-year-old boy is seen by a pediatrician because his parents are concerned about his aggressive behavior, hyperactivity, and loss of language skills. He has recently become increasingly unsteady on his feet and has experienced a recent seizure. In addition, slight facial feature coarsening is noted. In which of the following processes is this child
A 6-year-old boy is seen by a pediatrician because his parents are concerned about his aggressive behavior, hyperactivity, and loss of language skills. He has recently become increasingly unsteady on his feet and has experienced a recent seizure. In addition, slight facial feature coarsening is noted. In which of the following processes is this child
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Case details An 8-year-old child requires surgical intervention and substantial recovery time in the hospital. Therefore, a nutritionist recommends a specific dietary plan. The plan includes a protein-rich diet with the special supplementation of an amino acid that is typically considered nonessential but becomes an essential amino acid under enhanced growth or surgical recovery conditions.
1)- Several complexes in the electron transport chain contain non-heme iron. The iron in these complexes is bound tightly to which of the following amino acids? a) Serine b) Tyrosine c) Cysteine d) Methionine e) Glutamine 2)- A 27 –year-old female with epilepsy has been taking Phenytoin to control her seizures. She is pregnant and
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A 23 –year- old female was brought for consultation by her mother, who was troubled by her daughter’s continuous fatigue, dizziness, and loss of weight. The patient was 6 feet 2 inches tall and weighed 100 pounds. Further questioning revealed that the young woman had been virtually fasting for four months, hoping to obtain a
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Case details A 54- year-old man with Type 1 diabetes is referred to an ophthalmologist for evaluation of developing cataracts. Blood chemistry results are shown below: Fasting blood glucose 198 mg/dl Hemoglobin A 15 gm/dl Hemoglobin A1c 10% of total Hb Urine ketones Positive Urine glucose Positive Which of the following enzymes is most strongly
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Q.- Adenosine triphosphate (ATP) is the energy currency within the cell. Which of the following best describes the type of compound ATP is? A. Phospholipid B. Amino acid C. Nucleotide D. Triacylglycerol E. Oligosaccharide. Details The correct answer is -C- Nucleotide. The nucleotide coenzyme adenosine triphosphate (ATP) is the most important form of chemical energy
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Case details A 5- year-old boy suffered gastroenteritis for two days and was brought to the emergency in a semiconscious state. Blood glucose at the time of admission was 45 mg/dl and his urine was negative for glucose and ketone bodies. Glucose was administered intravenously, and his condition improved within 10 minutes. Subsequent laboratory investigations
Elevated Acyl carnitine compounds and associated hypoglycemia- What is the defect? Read More »
