Enzymes and Carbohydrate Metabolism Quiz
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Questions and Answers

Which enzymes are involved in the disintegration of proteincarbohydrate complexes?

  • Glycosidases and lipases
  • Glycosidases and sulphatases (correct)
  • Proteases and lipases
  • Proteases and sulphatases

What are the functions of mucoproteins?

  • Transport trace elements and possess enzymatic activity
  • Reduce friction and form cell surface receptors (correct)
  • Reduce friction, enzymatic activity, and transport trace elements
  • Reduce friction, form cell surface receptors, and possess enzymatic activity

Which compounds are present in dentin?

  • Glycoproteins and proteoglycans (correct)
  • Glycoproteins, proteoglycans, and albumins
  • Proteoglycans and albumins
  • Mucoproteins and glycoproteins

What is the predominant amino acid in the structure of collagen?

<p>Glycine (A)</p> Signup and view all the answers

What is the non-protein group in collagen?

<p>Oligosaccharide (D)</p> Signup and view all the answers

Which type of collagen is found in basal membranes?

<p>Type IV (A)</p> Signup and view all the answers

Which of the following is the correct sequence of intermediates produced in lactate oxidation?

<p>lactate → pyruvate → acetyl-CoA → CO2 (D)</p> Signup and view all the answers

Which of the following is the correct sequence of intermediates in gluconeogenesis starting from aspartate?

<p>aspartate → oxaloacetate → phosphoenolpyruvate → fructose-1,6-bisphosphate (D)</p> Signup and view all the answers

Which of the following is the correct sequence of enzymes participating in lactate oxidation to CO2 and H2O?

<p>lactate dehydrogenase → pyruvate dehydrogenase → isocitrate dehydrogenase (C)</p> Signup and view all the answers

Which of the following processes require ATP?

<p>all of the above (D)</p> Signup and view all the answers

Which of the following are components of the adenylate system?

<p>AMP, ATP, and pyrophosphate (B)</p> Signup and view all the answers

At what stages of the Krebs cycle do decarboxylation reactions take place?

<p>at the conversion of citrate to isocitrate and at the conversion of α-ketoglutarate to succinyl-CoA (B)</p> Signup and view all the answers

According to the chemical-parasitic theory of Miller, at what pH does demineralization of tooth enamel occur?

<p>4.5 (C)</p> Signup and view all the answers

Which of the following is a sucrose sorbent on teeth that can contribute to dental caries?

<p>Dextran (D)</p> Signup and view all the answers

Which of the following is a key reaction in gluconeogenesis?

<p>Fructose-1,6-bisphosphate + H2O → Fructose-6-phosphate + Pi (C)</p> Signup and view all the answers

Which of the following is not a substrate for gluconeogenesis?

<p>Acetoacetyl-CoA (D)</p> Signup and view all the answers

Which of the following intermediate metabolites is produced during glycogen synthesis in cariogenic bacteria?

<p>ADP-glucose (B)</p> Signup and view all the answers

Which of the following is not a characteristic of dental caries?

<p>It is caused by a single microorganism (B)</p> Signup and view all the answers

Which of the following polysaccharides can be synthesized by cariogenic bacteria?

<p>Dextran (B)</p> Signup and view all the answers

Which of the following is not a biological role of nonoxidative phase of pentose phosphate pathway?

<p>Reduction of NAD+ (D)</p> Signup and view all the answers

Which of the following organs has a complete set of gluconeogenesis enzymes?

<p>Liver (D)</p> Signup and view all the answers

How many moles of ATP can be synthesized in oxidation of 1 mole of acetyl-CoA to CO2 and H2O?

<p>16 (B)</p> Signup and view all the answers

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