Micro LAB exam 1 – KU with correct answers 100% 2026

Micro LAB exam 1 – KU with correct answers 100% 2026 Color of gram positive cells - Correct Answer Purple Color of gram negative cells - Correct Answer Pink Effective hand washing will A. sterilize the skin. B. minimize direct person-to-person transmission of pathogens C. protect the hands from UV exposure. D. prevent the growth of normal microbiota - Correct Answer B. Minimize direct person-to-person transmission of pathogens Which result indicates that a hand-cleansing agent is effective? A. There is more growth on the "after" side than on the corresponding "before" side. B. There is less growth on the "after" side than on the corresponding "before" side. C. The amount of growth on the "before" and the "after" sides is the same D. The amount of growth on the "before" and the "after" sides is different, but it doesn't matter which has less. - Correct Answer B. Less growth on the "after" side than on the corresponding "before" side Most microscopes are parfocal. This means that the distance from the nosepiece opening to the focal plane of each lens has been standardized. What does this mean to you with regard to how you use the microscope? A. When the specimen is in focus, the slide will always be the same distance away from the end of the lens no matter which lens is being used B. Once the specimen is in focus under a low power lens, the microscope can be switched to a higher power lens without moving the stage and the image will be in or nearly in focus no matter what lens is used. C. All lenses will need to be used the same way, either through air or through oil. D. That the interpupillary distance and ocular focus ring will need to be adjusted for every lens being used. - Correct Answer D. Need to be adjusted for every lens being used -DOUBLE CHECK- When preparing a bacterial smear for staining, why is it important to air dry the slides before heat fixing? A. To keep the cells on the slides from becoming too hot. B. To kill the cells. C. To prevent boiling during the heat-fix that would damage the cells. D. It is not important to the preparation. - Correct Answer C. Prevent boiling (causes an aerosol ) during heat-fix that would damage the cells To observe shape of individual bacterial cells typically requires total magnification of: (a) 10x (b) 100x (c) 1x (d) 1000x (e) 10,000x - Correct Answer D. 1000x (10 ocular times 100 objective lens)