Which of the following describes how facilitated diffusion is powered?
a. ATP is required directly.
b. Facilitated diffusion is "free of cost."
c. Facilitated diffusion is powered by endocytosis.
d. The sodium-potassium pump powers facilitated diffusion.
e. Energy is required to do the work of establishing and maintaining a concentration gradient.
e
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What color develops when I2KI reacts with starches in a sample?
a. Blue b. Blue-green c. Purple d. Red
Four of the following statements about Neanderthals are true. Which statement is false?
A. Neanderthals diverged from modern humans around 500,000 years ago. B. Neanderthals lived in Europe and the Middle East. C. Neanderthals are direct ancestors of Homo sapiens. D. Neanderthals stood upright. E. Neanderthals have no modern descendants.
Smallpox is considered a serious potential biological weapon, whereas anthrax has been successfully used as one. Compare and contrast their potential with regard to the criteria for assessing biological threats
What will be an ideal response?
The virus known as ________ primarily infects lymphocytes.
A. BK virus B. Adenovirus C. B19 virus D. HHV-6 E. HHV-8