The collector lens in the base of the microscope enlarges and projects:
A) the image of the lamp filament on the ocular.
B) the specimen image on the objective.
C) the specimen image on the ocular.
D) the image of the lamp filament on the substage condenser.
Question 2
Which of the following laboratory techniques is useful for detecting porphyrins in fecal specimens?
A) A simple qualitative screening test using fluorometry to detect the red-pink fluorescence produced when a detectable quantity of porphyrin is present
B) Placing a hydrogen ion-selective electrode into the fecal specimen to measure fecal pH
C) A simple mass spectrophotometric assay that is highly sensitive and specific for specific porphyrins and their metabolites
D) A simple spectrophotometric test used to detect the enzymes at 340 nm, which are deficient in porphyria
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