Biochemistry Quiz

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Questions and Answers

Which of the following enzymes is regulated by insulin through phosphorylation?

  • glucose-6-phosphatase
  • phosphofructokinase 1
  • glycogen synthase (correct)
  • pyruvate kinase

Which of the following statements about lipoproteins is correct?

  • Chylomicrons transport cholesterol from the liver to peripheral tissues
  • HDL transports triglycerides from the liver to peripheral tissues
  • VLDL transports cholesterol from peripheral tissues to the liver
  • LDL transports triglycerides from the liver to peripheral tissues (correct)

What is the source of blood glucose during fasting?

  • Glycogenolysis
  • Gluconeogenesis (correct)
  • Protein synthesis
  • Glycolysis

Which of the following isoenzymes increases in myocardial infarction?

<p>LDH1 and LDH2 (A)</p> Signup and view all the answers

What is the effect of insulin on muscle?

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

What is the function of CETP?

<p>Transfers triglycerides and cholesterol esters between HDL and VLDL (B)</p> Signup and view all the answers

What is the primary source of VLDL formation?

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

What is the active form of the insulin receptor?

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

Which of the following statements is correct about GLUT4?

<p>It is the primary glucose transporter in muscle cells (B)</p> Signup and view all the answers

What happens to the level of α1-antitripsin in acute inflammation?

<p>It remains normal (A)</p> Signup and view all the answers

What is the function of ceruloplasmin?

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

What is the characteristic of serum compared to plasma?

<p>It has the same composition minus fibrinogen (C)</p> Signup and view all the answers

What is one of the roles of albumin in the blood?

<p>to maintain osmotic pressure (B)</p> Signup and view all the answers

Which metabolic pathway is stimulated by insulin in the context of glucose metabolism?

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

What is the role of α1-glycoprotein acid?

<p>in chronic inflammation (C)</p> Signup and view all the answers

Which of the following is a marker specific to liver pathology?

<p>Gamma-glutamyl transferase (γ-GT) (C)</p> Signup and view all the answers

Which of the following lipoproteins are responsible for the appearance of triglycerides in plasma?

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

What is a characteristic of chylomicrons?

<p>they are transformed by lipoprotein lipase (C)</p> Signup and view all the answers

Which lipoprotein receives apo CII from HDL?

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

What is a possible deficiency in the patient with a triglyceride concentration of 2,000 mg/dl?

<p>Apo C-II (B)</p> Signup and view all the answers

Hypoalbuminemia can occur in which of the following conditions?

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

In chronic inflammation, which type of globulins increases?

<p>α2-globulins (A)</p> Signup and view all the answers

What is characteristic of diabetes type 1?

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

What is the main function of albumin in the body?

<p>Maintaining water in the extravascular sector (D)</p> Signup and view all the answers

Which enzyme is involved in maintaining glycemia?

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

What is the main function of transferrin?

<p>To transport iron (A)</p> Signup and view all the answers

What is the effect of Apolipoprotein C-II on lipoprotein lipase?

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

What is haptoglobin a marker for?

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

What can cause hyperglycemia in an insulin-dependent patient?

<p>Defect in glucose entry into muscle cells (B)</p> Signup and view all the answers

Which lipoprotein is considered anti-atherogenic?

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

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