Which of the following environmental factors generally do(es) not have an impact on the efficiency of an antimicrobial agent?

A. Presence or absence of a biofilm
B. Concentration of organic matter
C. Refractive index
D. pH


Answer: C

Biology & Microbiology

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Genes that are closely related evolutionarily, have the same function, and are present in the genomes oftwo or more

different organisms are called _____.

a. genologs b. heterologs c. Paralogs d. Metalogs e. orthologs

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When making a karyotype, what is the effect of placing lymphocytes in a low-salt solution?

A. It makes the chromosomes more visible. B. It initiates cell division. C. It stops the cells in metaphase. D. It helps separate the chromosomes. E. It causes the cells to swell.

Biology & Microbiology

Which of the following structures stores sperm while it matures?

A) vas deferens B) epididymis C) testes D) seminiferous tubules

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All of the following pertain to the fluorescence microscope except it

A. requires an ultraviolet radiation source. B. requires the use of dyes like acridine and fluorescein. C. uses electrons to produce a specimen image. D. is commonly used to diagnose certain infections. E. is a type of compound microscope.

Biology & Microbiology