During neuronal signaling, a change in membrane potential will cause sodium channels to open and let Na+ ions diffuse down their concentration gradient into the cell. Which of the following helps establish the concentration gradient necessary for this process to occur?
A. Na+/K+ channel
B. voltage-gated Na+ channel
C. Na+ symporter
D. Na+/K+ pump
D
Biology & Microbiology
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German measles is caused by the ________ virus.
A. coxsackievirus A B. herpes-zoster C. reovirus D. rubella
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The concept of a prokaryote was first fully outlined in 1962 by
A. Hershey and Chase. B. Gilbert and Cech. C. Stanier and Van Niel. D. Watson and Crick.
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The composition of glomerular filtrate is almost identical to that of urine
Indicate whether the statement is true or false
Biology & Microbiology
The bacteria that today are most similar to chloroplasts are
A. thermoacidophiles. B. methanogens. C. nonsulfur purple bacteria. D. cyanobacteria.
Biology & Microbiology