A urease test is used to identify Mycobacterium tuberculosis because
A) urease is a sign of tuberculosis.
B) M. tuberculosis produces urease.
C) urea accumulates during tuberculosis.
D) some bacteria reduce nitrate ion.
E) M. bovis can cause tuberculosis.
Ans: B) M. tuberculosis produces urease.
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Approximately how many bases of RNA are hydrogen bonded to DNA within an RNA polymerase in E. coli?
A. 4 B. 8 C. 10 D. 14 E. 35
An infection that develops while being treated at a hospital or medical facility is called a(n)_____ infection
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT an advantage of
asexual reproduction? a. Asexual reproduction is more efficient than sexual reproduction. b. Individual organisms do not have to seek mates. c. Asexual reproduction promotes variation. d. Asexual reproduction is less energetically costly than sexual reproduction. e. In stable environments the offspring are as well adapted as the parents.
The relatively shallow part of the ocean extending from the low tide mark to the edge of the continental shelf is called the
A. littoral zone. B. limnetic zone. C. neritic zone. D. surface zone. E. abyssal zone.