Over-the-counter medications for acid reflux or heartburn block the production of stomach acid. Which of the following cells are directly affected by this medication?

A) goblet cells
B) chief cells
C) parietal cells
D) smooth muscle cells


Answer: C

Biology & Microbiology

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Of the following organisms, which one is among the Aggregatibacter aphrophilus, Aggregati-bacter actinomycetemcomitans, Cardiobacterium hominis, Eikenella corrodens, and Kingella spp. (HACEK) group of organisms that cause slowly progressive bacterial endocarditis?

a. Capnocytophaga gingivalis b. Sphingomonas paucimobilis c. E. corrodens d. A. actinomycetemcomitans

Biology & Microbiology

Why does the presence of telomeres protect the ends of linear chromosomes?

A. Telomere DNA is resistant to nuclease activity. B. The telomeres represent large "buffer zones" of DNA sequence that do not code for biomolecules. Loss of these sequences is easily tolerated. C. Every time somatic cells replicate, telomerase extends the ends of the chromosomes. D. Specialized telomere-binding proteins prevent loss of DNA during replication. E. None of these choices is correct.

Biology & Microbiology

Fanny Hesse first suggested that agar be used to solidify microbiological media.

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

Biology & Microbiology

Most animals fall into one of how many phyla?

A. 5 B. 9 C. 100 D. 35

Biology & Microbiology