Nearly all ___ are located in the central
nervous system.
a. sensory neurons
b. interneurons
c. motor neurons
d. peripheral neurons
e. sensory and motor neurons
B
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You have been given vials of H2, Na, H2O, Hg, and CH4. What are the majority of your vials filled with?
A. Liquids at room temperature. B. Gases. C. Molecules. D. Carboxyls.
In an experiment, a scientist isolates mitochondria from living cells and suspends them in two different buffered solutions. One solution is maintained at ph 4, while the other solution is maintained at ph 9. the scientist finds that mitochondria in the solution at ph 4 continue to produce atp but those in the ph 9 solution do not. The results of the experiment can be used as evidence in support of which of the following scientific claims about mitochondrial activity
A. mitochondria in a cell-free environment are unable to convert thermal energy into atp, B. the electron transport chain pumps electrons from the cytosol to the mitochondrial matrix C. atp production in mitochondria requires a hydrogen ion gradient that favors movement of protons into the mitochondrial matrix D. atp synthase molecules change their orientation in relation to the proton gradient across the mitochondrial membrane
Membrane phospholipids
A) have hydrophobic heads that face the center of the membrane and are shielded from water. B) have hydrophilic tails that face outward and are exposed to water. C) are able to drift about in the plasma membrane. D) remain fluid because they are tightly packed against one another.
For mechanisms of sex determination, which of the following is incorrectly paired?
A. high temperature-low temperature; alligator B. ZZ-ZW; bluebird C. X-O; grasshopper D. X-Y; cow E. 1n-2n; pea plant