BIO 2104 LAB PRACTICAL FINAL EXAM 2025

course adjustment knob - Moves the stage up and down for focusing fine adjustment knob - Fine tunes the focus and increases the detail of the specimen. oil immersion lens (100x) - only lens that uses oil labeling plates - -Label bottom (agar side) of the plate - Do not label lid -Plates should be inverted when incubating streak plate technique - a technique which produces isolated colonies of an organism gram positive stain - retain crystal violet and stain purple, thick peptidoglycan cell wall gram negative stain - pink or red, thin peptidoglycan and outer membrane endospore stain - Used to distinguish endospores from vegetative cells. Endospores appear green capsule staining - Negative stain - capsules colorless against a stained background Bio 2104 Bio 2104 acid fast stain - Acid fastness is a physical property that gives a bacterium the ability to resist decolorization by acids during staining procedures. used to detect TB and mycobacterium acid fast bacteria - Retain the primary stain even when treated with acid alcohol. (pink)