In performing a Ziehl-Neelsen's staining techniques, the counterstain is

A. Carbolfuchsin
B. Methylene blue
C. Malachite green
D. Crystal violet
E. Safranin


Ans: B. Methylene blue

Biology & Microbiology

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Answer the question using the accompanying figure. At which point in this action potential diagram does the onset of

Na+ channel inactivation stop the inward flow of Na+?

a. A b. B

c. C d. D e. E

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Which cells of the pancreas produce glucagon?

a. alpha cells b. beta cells c. delta cells d. F cells e. gamma cells

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________ are mammals that lay eggs

Fill in the blank(s) with correct word

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Specificity and memory are associated with which body defense mechanism?

A. Phagocytosis by macrophages and neutrophils B. T-cell and B-cell responses C. Interferon D. Anatomical barriers in the body E. Inflammatory response

Biology & Microbiology