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  • Question 1 - Phosphorylation of glucose once it enters the cell is catalysed by which enzyme?...

    Incorrect

    • Phosphorylation of glucose once it enters the cell is catalysed by which enzyme?

      Your Answer: Glucose-6-phosphate synthetase

      Correct Answer: Hexokinase

      Explanation:

      Glucose 6-phosphate is produced by phosphorylation of glucose on the sixth carbon. This is catalysed by the enzyme hexokinase in most cells. One molecule of ATP is consumed in this reaction.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      12.4
      Seconds

  • Question 2 - Which enzyme hydrolyses triglycerides in lipoproteins into free fatty acids for storage in...

    Correct

    • Which enzyme hydrolyses triglycerides in lipoproteins into free fatty acids for storage in fat cells?

      Your Answer: Lipoprotein lipase

      Explanation:

      Lipoprotein lipase is a water-soluble enzyme that hydrolyses triglycerides in lipoproteins, such as those found in chylomicrons and very low-density lipoproteins (VLDL), into two free fatty acids and one monoacylglycerol molecule.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      6.1
      Seconds

  • Question 3 - Which lipoprotein is responsible for lowering of plasma lipids? ...

    Correct

    • Which lipoprotein is responsible for lowering of plasma lipids?

      Your Answer: HDL

      Explanation:

      High-density lipoproteins (HDL) are one of the five major groups of lipoproteins. Lipoproteins are complex particles composed of multiple proteins which transport all fat molecules (lipids) around the body within the water outside cells. Unlike the larger lipoprotein particles which deliver fat molecules to cells, HDL particles remove fat molecules from cells.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      3.9
      Seconds

  • Question 4 - Bile acids will be prevented from being absorbed by resection of which part...

    Incorrect

    • Bile acids will be prevented from being absorbed by resection of which part of the gastrointestinal tract?

      Your Answer: Duodenum

      Correct Answer: Ileum

      Explanation:

      Bile acids (also called bile salts) are produced in the liver, secreted into the biliary system, stored in the gallbladder and are released after meals stimulated by cholecystokinin. They are important for the digestion and absorption of fats (lipids) in the small intestine. Usually over 95% of the bile acids are absorbed in the terminal ileum and are taken up by the liver and resecreted.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      8.7
      Seconds

  • Question 5 - Which of the following is an example of a ketone body? ...

    Correct

    • Which of the following is an example of a ketone body?

      Your Answer: Acetoacetate

      Explanation:

      Ketone bodies are three water-soluble molecules (acetoacetate, beta-hydroxybutyrate, and their spontaneous breakdown product, acetone) that are produced by the liver from fatty acids during periods of low food intake (fasting), carbohydrate restrictive diets, starvation, prolonged intense exercise, alcoholism or in untreated (or inadequately treated) type 1 diabetes mellitus.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      9.7
      Seconds

  • Question 6 - Which enzyme deficiency can lead to ammonia intoxication? ...

    Correct

    • Which enzyme deficiency can lead to ammonia intoxication?

      Your Answer: Ornithine transcarbamylase

      Explanation:

      Ornithine transcarbamylase deficiency also known as OTC deficiency is the most common urea cycle disorder in humans. Ornithine transcarbamylase, the defective enzyme in this disorder is the final enzyme in the proximal portion of the urea cycle, responsible for converting carbamoyl phosphate and ornithine into citrulline. OTC deficiency is inherited in an X-linked recessive manner, meaning males are more commonly affected than females.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      5.1
      Seconds

  • Question 7 - A deficiency in Cyanocobalamin leads to which clinical deficiency syndrome? ...

    Correct

    • A deficiency in Cyanocobalamin leads to which clinical deficiency syndrome?

      Your Answer: Pernicious anaemia

      Explanation:

      The main syndrome of vitamin B12 deficiency is pernicious anaemia. It is characterized by a triad of symptoms:Megaloblastic anaemiaGastrointestinal symptoms &Neurological symptoms

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      2.7
      Seconds

  • Question 8 - What catalyses the conversion of adenosine to inosine? ...

    Correct

    • What catalyses the conversion of adenosine to inosine?

      Your Answer: Adenosine deaminase

      Explanation:

      Adenosine deaminase (ADA) is an enzyme involved in purine metabolism. It is needed for the breakdown of adenosine from food and for the turnover of nucleic acids in tissues. ADA irreversibly deaminates adenosine, converting it to the related nucleoside inosine by the substitution of the amino group for a keto group.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      12.1
      Seconds

  • Question 9 - Which lipoprotein contains the most cholesterol esters? ...

    Incorrect

    • Which lipoprotein contains the most cholesterol esters?

      Your Answer: Chylomicrons

      Correct Answer: LDL

      Explanation:

      LDL and HDL transport both dietary and endogenous cholesterol in the plasma, but LDL is the main transporter of cholesterol and cholesteryl esters.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      4.5
      Seconds

  • Question 10 - The complex twisting and folding of peptide chains describes which order of protein...

    Correct

    • The complex twisting and folding of peptide chains describes which order of protein structure?

      Your Answer: Secondary structure

      Explanation:

      Secondary Structure refers to the coiling or folding of a polypeptide chain that gives the protein its 3-D shape. There are two types of secondary structures: the alpha (α) helix and the beta (β) pleated sheet.

    • This question is part of the following fields:

      • Medicine
      • Metabolism
      23.7
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Medicine (7/10) 70%
Metabolism (7/10) 70%
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