Question 1

The most important buffer pair in plasma is the

Options :

A : bicarbonate/carbonic acid pair

B : phosphate/biphosphate pair

C : hemoglobin/imidazole pair

D : sulfate/bisulfate pair

Answer: A

Question 2

Quality control results for disk diffusion susceptibility tests yield the following results aminoglycoside zones too small and penicillin zones too large. This is most likely due to the

Options :

A : Inoculum being too heavy

B : Inoculum being too light

C : pH of MuellerHinton agar being too low

D : calcium and magnesium, concentration in the agar being too high

Answer: C

Question 3

The reason carbon monoxide is so toxic is because it

Options :

A : is a protoplasmic poison

B : has 200 times the affinity of oxygen for hemoglobin binding sites

C : combines with cytochrome oxidase

D : sensitizes the myocardium

Answer: B

Question 4

Analysis of CSF for oligoclonal bands is used to screen for ________.

Options :

A : multiple sclerosis

B : multiple myeloma

C : myasthenia gravis

D : von Willebrand disease

Answer: A

Question 5

Dolichos biflorus

Options :

A : A qualitative disorder of erythroid, myeloid and/ or megakaryoctic cell series

B : Acute monoblastic leukemia

C : Acute myeloblastic leukemia without maturaation

D : AntiA1 lectin is extracted from the seeds of Dolichos biflorus. This reagent will agglutinate A1 cells, but not A2 cells

Answer: D

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