Oxygen is necessary for cellular respiration because oxygen
A) combines with carbon to form carbon dioxide.
B) reduces glucose to form carbon dioxide and water.
C) combines with electrons to form CO2.
D) combines with electrons and hydrogen ions to form water.
E) combines with carbon dioxide and water to form glucose.
D
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Smooth muscle is found in all of the following places except ________
a. the stomach b. biceps muscles in arms c. the uterus d. the sphincter of bladder
The use of venom for paralyzing prey is common in
a. cowries. b. Triton's trumpet snail. c. cone snails. d. mantis shrimp. e. sea stars.
Exotic species that are introduced into a non-native
habitat can a. interbreed with native species. b. drive endemic species to extinction. c. die out due to competition from native species. d. blend in with endemic species. e. create habitat islands for themselves.
An organism acquires a mutation in the gene for pyruvate dehydrogenase that renders the protein unable to bind NADH. What is the most likely consequence of this mutation?
A. Substrate level phosphorylation will cease to occur. B. Fats will be oxidized at a higher rate than normal. C. Pyruvate oxidation will cease to occur. D. ATP synthesis will proceed at a high rate even when the cell has an ample supply. E. Pyruvate will not be able to enter the mitochondria.