Stage 1 of oxidative phosphorylation requires the movement of electrons along the electron-transport chain coupled to the pumping of protons into the intermembrane space. What is the final result of these electron transfers?
(a) OH– is oxidized to O2
(b) pyruvate is oxidized to CO2
(c) O2 is reduced to H2O
(d) H– is converted to H2
(c) Contrary to what the term "oxidative phosphorylation" may imply, the phosphorylation event does not depend on an oxidative reaction, but rather on the reduction of molecular oxygen, converting it to water.
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The terminating step of moving electrons onto oxygen releases additional ATP during aerobic metabolism not made during anaerobic growth
Indicate whether the statement is true or false.
Which compounds serve as major sources of energy for ruminant animals?
A) acetic acid and glucose B) acetic, butyric, and propionic acids C) dimethylsulfoniopropionate, gluconate, and protocatechuate D) glucose and sucrose
Children born with fetal alcohol syndrome have
A. cognitive disorders. B. three copies of chromosome 21. C. a gap between the mouth and nasal cavity. D. a gap in the posterior region of the neural tube. E. All of the above.
Which of the following situations in not an example of directional selection? a. Peppered moths in England
b. All of these are examples of directional selection. c. Rock pocket mice in Arizona. d. Antibiotic resistance in bacteria. e. None of these are examples of directional selection.