Electrons lose energy as they pass down the electron transport chain. What is this energy used for?
A) to power hydrogen ion pumps B) to power water pumps
C) to directly power ATP synthase D) to link oxygen to hydrogen ions
Answer: A
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Gastrulation results in the formation of:
A. a bilaminar embryo consisting of the epiblast and the hypoblast. B. a trilaminar embryo consisting of the epiblast, the mesoblast, and the hypoblast. C. a gastrula consisting of a trilaminar embryo. D. a trilaminar embryo consisting of ectoderm, endoderm, and mesoderm. E. a bilaminar gastrula consisting of the epiblast and the hypoblast.
Life today derives nearly all its energy from ____
a. glucose molecules b. the sun c. hydrothermal vents d. geochemical activity e. radioactive decay
Four of the following are found in the fluid in the fluid at the end of the proximal tubules. Which one would NOT be
found? a. H+ b. water c. glucose d. NaCl e. urea
Acne is caused by problems with the:
A) sebaceous glands. B) endocrine glands. C) hair follicles. D) sweat glands.