Practice questions

Biochemistry Challenge- Part 2

With 21 questions, in this section, you’ll explore real-world applications of biochemistry, sharpen your critical thinking, and connect biochemical concepts to clinical insights. Dive in, think deeply, and discover the fascinating intricacies of metabolic pathways. 1. A 35-year-old factory worker is brought to the emergency department after accidental exposure to cyanide fumes. The patient presents […]

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Biochemistry Challenge- Part 1

Through hypothetical clinical cases and research scenarios, this activity will challenge your understanding of carbohydrate metabolism, amino acid metabolism, oxidative phosphorylation, and enzymes. With 25 questions, in this section, you’ll explore real-world applications of biochemistry, sharpen your critical thinking, and connect biochemical concepts to clinical insights. Dive in, think deeply, and discover the fascinating intricacies

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Explanations of Quiz on Nucleotide Metabolism

1. A 2-year-old child presents to the clinic with failure to thrive and megaloblastic anemia. Laboratory tests reveal elevated urinary orotic acid levels but normal ammonia levels, normal CSF glutamine levels, and normal serum vitamin B12 and folate levels. Which enzyme deficiency is the most likely cause of this child’s condition? A. Adenosine deaminase B.

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Explanations of Quiz on Lipid Metabolism

1. In adipose tissue, through which of the following intermediates can glucose be converted to glycerol-3-phosphate for the esterification of fatty acids to form triglycerides? A. Acetyl CoA B. Dihydroxyacetone phosphate C. Glycerol D. Malate E. Pyruvate Correct Answer: B. Dihydroxyacetone phosphate: Explanation: Dihydroxyacetone phosphate (DHAP), derived from glycolysis, is reduced to glycerol-3-phosphate by the

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Nucleotide metabolism- A Quiz for self-assessment

Dear Students, You are invited to take this quiz, which consists of 25 questions designed to test your understanding of the topic. The entire activity will take approximately 40 minutes to complete. Detailed explanations for all questions will be posted later on the website to help you deepen your knowledge. Happy learning, and good luck! Click the link or

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Fatty acid and Triglyceride metabolism- a quiz for self-assessment

Dear students, This 32-question quiz is designed to help you assess your understanding of key concepts in fatty acid and triglyceride metabolism and identify any gaps in your learning. The entire activity is timed for a maximum of 50 minutes, and you are encouraged to complete it in one sitting. You can attempt the quiz

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Nucleotide metabolism-Multiple-choice questions with explanations

Question 1: A 3-month-old male infant presents with delayed motor development and orange, sand-like crystals in his diaper. His parents report he constantly chews on his fingers and lips, causing bleeding. Based on these symptoms, what is the most likely diagnosis? A. Adenosine deaminase deficiency B. Gouty arthritis C. Lesch-Nyhan Syndrome D. Orotic aciduria E.

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Fructose and Galactose metabolism- Multiple-choice questions with explanations

1. An exclusively breast-fed infant presents with vomiting, weight loss, jaundice, hepatomegaly, and bilateral cataracts. Which condition is most likely responsible for these symptoms? A. Breast milk jaundice B. Classical Galactosemia C. Hereditary fructose intolerance D. Type 1 Diabetes mellitus E. Von Gierke’s disease Correct Answer: B. Classical Galactosemia Explanation: Classical galactosemia is a rare

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Ammonia Disposal – Short-answer questions

Question 1: What is the primary function of the urea cycle in humans? Answer: The urea cycle converts ammonia, a highly toxic byproduct of amino acid metabolism, into urea, a less toxic compound that can be safely excreted in urine. This process is vital for maintaining nitrogen balance in the body. Question 2: Which cellular

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Amino Acid Metabolism-Multiple-Choice Questions- Set 1

Q.1 – Which of the following is a common compound shared by the TCA (Tricarboxylic Acid) cycle and the Urea cycle? A. α-Ketoglutarate B. Succinyl-CoA C. Oxaloacetate D. Fumarate E. Citrate Correct Answer: D. Fumarate Explanation: Fumarate is a key intermediate shared between the TCA and Urea cycles. In the Urea cycle, fumarate is produced

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