Select the true statement about Helicobacter pylori.

A. It is a gram-positive coccus that causes skin infections.
B. It is a gram-negative spiral bacterium that causes ulcers.
C. It lacks a cell wall and produces a lot of acid.
D. It can be detected by testing for cold agglutinins.


Ans: B. It is a gram-negative spiral bacterium that causes ulcers.

Biology & Microbiology

You might also like to view...

The transcribed, but not translated, sequence that is immediately upstream of the region that encodes the functional product is called the ________ region.

A. trailer B. coding C. leader D. promoter

Biology & Microbiology

The difference between innate immunity and adaptive immunity is that

A) adaptive immunity attacks pathogens; innate immunity attacks microbes. B) innate immunity targets cancers and transplants; adaptive immunity targets viruses and bacteria. C) innate immunity is fast and generalized; adaptive immunity is slow and specific. D) adaptive immunity releases cytokines; innate immunity produces antibodies.

Biology & Microbiology

____ food chains tend to predominate in aquatic ecosystems

a. Higher trophic level b. Primary consumer c. Decomposing d. Grazing e. Detrital

Biology & Microbiology

Which of the following common epidemiological measurement is calculated by dividing the number of disease-related deaths within a specified period by the number of people with the disease?

A) Morbidity B) Mortality C) Incidence

Biology & Microbiology