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Cell Biology UMKC

Dr. King Exam 2 Fall 2010

QuestionAnswer
An example of an electron carrier which moves in the lipid bilayer to transport electrons from one proton-pumping complex to the next, but is not part of a proton-pumping complex, is NADH NADH dehydrogenase ubiquinone cytochrome oxidase Fe-S centers NADH
Which of the following is not an electron carrier that participates in the electron-transport chain? A) cytochrome B) ubiquinone C) rhodopsin D) copper ion E) NADH C) rhodopsin
Which component of the electron-transport chain is required to combine the pair of electrons with molecular oxygen? A) cytochrome c B) cytochrome b-c1 complex C) ubiquinone D) cytochrome oxidase complex E) NADH dehydrogenase complex D) cytochrome oxidase complex
What mechanism do inhibitory neurotransmitters prevent the postsynaptic cell from firing action potential? A)closing Na+channels B)preventing the secretion of excitatory neurotransmitters C)opening K+ channels D)opening Cl– channels E)opening Na+ cha
For which of the following molecules would a transport protein by required to allow high rates of transport across a biological membrane? A) CO2 B) glucose C) glycerol D) O2 E) None of the above would require a transport protein. B) glucose
Which of the following is not one of the common ways to perform active transport? Na+-coupled ATP-driven light-driven NADPH-driven
A transmembrane protein has two binding sites. Both sites are exposed on one side , or other of the membrane. The protein is Antiport carrier (transporter) protein. Symport carrier (transporter) protein. Antiport channel Symport channel protein. Symport carrier (transporter) protein.
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