The process used by cells to convert the mRNA "message" into a sequence of amino acids is
A. amino acid synthesis.
B. replication.
C. mitosis.
D. translation.
E. transcription.
D. translation.
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Genetic engineering methods have been used to produce vaccines.
Answer the following statement true (T) or false (F)
When the membrane potential of a neuron reaches the threshold level:a
voltage-gated sodium channels open, and sodium diffuses out of the cell. b. voltage-gated potassium channels open for a very brief period. c. voltage-gated sodium channels close, so sodium cannot diffuse out of the cell. d. the sodium channel protein changes its shape to open the gates of the channel. e. the membrane potential is more negative than when at rest.
The ability to meet humanity's current needs without compromising the ability of future generations to
meet their needs is: a. environmental sustainability. b. species richness. c. biosphere diversity. d. resource conservation. e. habitat regeneration
Microbes known as transient microbiota are
A. microorganisms that remain with the person throughout life. B. microorganisms that may cause a disease under certain circumstances. C. organisms that remain in the body for a short time. D. unsuccessful microbial invaders because of the presence of preexisting microbes. E. sources of microbial contamination.