If someone has an upset stomach, such as traveler's diarrhea, and they ingest Lactobacillus acidophilus in order to treat the ailment, what is this type of therapy known as?

a. Chemotherapy
b. Active bacteria therapy
c. Antibiotic therapy
d. Probiotic therapy
e. Lactobacillus therapy


Ans: d. Probiotic therapy

Biology & Microbiology

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What type of chemical bonds are found within

a water molecule? a. hydrogen b. ionic c. polar covalent d. nonpolar covalent e. triple

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The bacteria that cause botulism cannot live in the

presence of a. carbon dioxide. b. oxygen. c. glucose. d. water. e. ATP.

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Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. Where will the virus be while dormant in the nerve cell?

a. Floating in the nerve cell cytoplasm b. Integrated in the nerve cell chromosomes c. In the nerve cell membrane d. Floating outside of the nerve cell, waiting to reinfect it e. In the blood

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Which of the following represents a molecule characterized by polar covalent bonding?

A) CH4 B) H2 C) NaCl D) H2O E) O2

Biology & Microbiology