Page 1 of 1: MCQ "2"

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Question 7. Which, if any, of the following statements is/are true of thrombin?

(a) It stimulates platelet aggregation.
True False

(b) Its formation is reduced by warfarin.
True False

(c) Its formation is reduced in patients with protein C deficiency.
True False

(d) It promotes activation of protein C.
True False

(e) It promotes crosslinking of fibrin strands.
True False

Question 8. Which, if any, of the following statements is/are true of vitamin K?

(a) Deficiency reduces prothrombin levels.
True False

(b) Deficiency reduces antithrombin levels.
True False

(c) It can be given to treat excessive warfarin activity.
True False

(d) Deficiency reduces protein C levels.
True False

(e) Low levels are observed in patients with liver disease.
True False

Question 9. Of the following characteristics of biomembranes, which is/are true?

(a) They act as a barrier to gases such as CO2 and O2.
True False

(b) Ion gradients are formed across membranes.
True False

(c) They are composed of phospholipids and proteins.
True False

(d) They are freely permeable to ionic compounds.
True False

Question 10. Which two of the following enzymes produce a product used for synthesis of ATP by substrate-level phosphorylation?

(a) Phosphofructokinase-1.
True False

(b) Aldolase.
True False

(c) Glyceraldehyde-3-phosphate dehydrogenase.
True False

(d) 1,3-biphosphoglycerate mutase.
True False

(e) Enolase.
True False

Question 11. Which of the following statements about the structure of cholesterol are true?

(a) It contains 27 carbon atoms.
True False

(b) It contains only carbon, hydrogen, and one oxygen atom.
True False

(c) It is saturated (no double bonds).
True False

(d) It contains four hexane rings fused together.
True False

Question 12. Which of the following are biologically active steroid hormones?

(a) Cortisol.
True False

(b) Aldosterone.
True False

(c) Testosterone.
True False

(d) Cholesterol.
True False

(e) Estradiol.
True False

Question 13. Which of the following is a primary bile acid?

(a) Glycocholic acid.
True False

(b) Glycochenodeoxycholic acid.
True False

(c) Deoxycholic acid.
True False

(d) Taurocholic acid.
True False

(e) Taurochenodeoxycholic acid.
True False

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