Which of the following are qualities of any good scientific hypothesis?
I. It is testable.
II. It is falsifiable.
III. It produces quantitative data.
IV. It produces results that can be replicated.
A) I only
B) III only
C) I and II
D) III and IV
C
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Within the transcription bubble, the 9 most recently added nucleotides in the newly synthesized RNA strand temporarily form a helix with the template DNA strand. How might transcription be affected if helix formation did not occur?
A. Rewinding the DNA molecule would be inhibited. B. Unwinding the DNA molecule would be inhibited. C. The position of the 5' end of the RNA would be unstable, inhibiting elongation. D. The position of the 3' end of the RNA would be unstable, inhibiting elongation. E. The position of the 5' end of the RNA would be unstable, stimulating elongation.
Meningitis
a. results when a virus or bacterium crosses the blood-brain barrier. b. is not usually fatal. c. results when cerebrospinal fluid seeps out of the meninges. d. occurs when white matter mixes with gray matter. e. includes all of these characteristics
Phagocytosis is a type of ________ in which a cell engulfs another cell
A) endocytosis B) passive transport C) exocytosis D) active transport E) facilitated diffusion
Which of the following antimicrobials does not match its target?
A) aminoglycosides: 30S subunit B) phenicols: 50S subunit C) macrolides: 50S subunit D) tetracyclines: 50S subunit E) lincosoamides: 50S subunit