Methanogens link ATP synthesis to methanogenesis by ________.
A. substrate-level phosphorylation
B. the use of bacteriorhodopsin
C. the reverse TCA cycle
D. electron transport to generate proton motive force
Answer: D
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What factor most limits a person’s maximal increase in cardiac output during exercise?
A. the rate at which cardiac muscle contracts B. the time it takes for electrical impulses to reach all parts of the heart C. the total amount of blood in an individual D. the time available to fill the heart chambers with blood as the heart rate increases E. the rate at which oxygen is delivered to the cardiac muscle cells Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the limiting factors on cardiac output? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
In the above diagram, C represents which of
the following structures?
a. large diameter blood vessel b. capillary beds c. the zone of diffusion of gases and nutrients d. the heart e. large diameter blood vessel and the zone of diffusion of gases and nutrients
What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule, where the two don't actively share an electron?
A) ionic bond B) covalent bond C) hydrogen bond D) disulfide bond E) hydrophobic bond
The ionic bond of sodium chloride is formed as a result of:
A) sodium giving up a proton to chlorine. B) both sodium and chlorine losing electrons. C) sodium gaining an electron from chlorine. D) sodium giving up an electron to chlorine. E) sodium and chlorine sharing electrons.