A unidirectional process where a specific compound released by one organism has a negative effect on another organism is called

A. commensalism.
B. negative cooperation.
C. predation.
D. amensalism.


Answer: D

Biology & Microbiology

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Stable integration of foreign DNA into a bacterial host genome is generally accomplished through induced plasmid transformation than by natural uptake of free DNA fragments. 

Answer the following statement true (T) or false (F)

Biology & Microbiology

You are developing an ELISA test to detect cysts of a parasitic protozoan in stool specimens. Select the following items that would be part of this test.

A. Patient specimens B. Enzyme-labeled antibody against the parasite C. Enzyme-labeled rabbit anti-human-IgG antibody D. Chromogenic enzyme substrate E. Microtiter plate containing wells coated with antibody against the parasite

Biology & Microbiology

During S phase, chromosomes are converted to what form?

A) chromatin B) karyotypes C) centrosomes D) sister chromatids

Biology & Microbiology

Which type of invasin allows a pathogen to break down a blood clot that the body has generated to trap their spread?

A) neuraminidase B) kinase C) coagulase D) flagella E) collagenase

Biology & Microbiology