All of the following statements concerning vitamin B2 functions are true EXCEPT:

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Question 1 of 5

All of the following statements concerning vitamin B2 functions are true EXCEPT:

A. Essential constituent of flavoproteins, flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) B. Plays key roles in hydrogen transfer reactions associated with glycolysis, TCA cycle and oxidative phosphorylation C. An essential coenzyme for oxidative decarboxylate of alpha-keto acids, most important being conversion of pyruvate to acetyl coenzyme A D. Deficiency symptoms are cheilitis, cheilosis and angular stomatitis

Correct Answer: C

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

Mechanism of action of calcitonin is:

A. Inhibits hydroxyapatite crystal formation, aggregation, and dissolution B. Raises intracellular cAMP in osteoclasts C. Activates bone resorption D. Inhibits macrophages

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

The major causes of hypomagnesaemia are:

A. Insufficient dietary intake, e.g. malnutrition B. Abnormal gastrointestinal loss, e.g. severe diarrhea or chronic alcoholism C. Abnormal renal loss, e.g. diabetes mellitus or during therapy with some kind of drugs such as amphotericin B, gentamicin, cisplatin, cardiac glycosides, distal and loop diuretics D. All of the above

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

The drug acts by affecting the tubular fluid composition in a non-receptor mediated fashion:

A. Furosemide (Lasix) B. Acetazolamide (Diamox) C. Triamterene (Dyrenium) D. Mannitol (Osmitrol)

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

Mechanism of Amphotericin B action is:

A. Inhibition of cell wall synthesis B. Inhibition of fungal protein synthesis C. Inhibition of DNA synthesis D. Alteration of cell membrane permeability

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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