Using the numbers 1-4, label the correct chronological sequence of events for the Gram staining procedure.(1, 2, 3, 4) Apply iodine for 1 minute to the smear and rinse.(1, 2, 3, 4) Add crystal violet for 60 seconds and rinse.(1, 2, 3, 4) Add 95% ethanol for 10-20 seconds and rinse.(1, 2, 3, 4) Apply safranin for 60 seconds and rinse.
Fill in the blank(s) with the appropriate word(s).
2, 1, 3, 4
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Genetic modification
A) alters genetic codes so that one species' code is like another's. B) adds sugars and phosphates in a nucleus. C) alters, deletes, or adds DNA to a cell. D) substitutes entire nuclei to genetically engineer a cell.
What is the immediate result once a signal molecule binds to a receptor protein-tyrosine kinase?
a. receptor dimerization b. receptor trimerization c. receptor denaturation d. receptor polymerization e. receptor hydrolysis
A population of organisms will not evolve if _____
A) all individual variation is due only to environmental factors B) the environment is changing at a relatively slow rate C) the population size is large D) the population lives in a habitat without competing species present
Members of the genus Mycobacterium cause which of the following diseases in humans?
A. Tuberculosis and Leprosy B. Meningitis C. Diphtheria D. Abscesses