The chemiosmotic hypothesis is an important concept in our understanding of cellular metabolism in general because it explains _____
A) how ATP is synthesized by a proton motive force
B) how electron transport can fuel substrate-level phosphorylation
C) the sequence of the electron transport chain molecules
D) the reduction of oxygen to water in the final steps of oxidative metabolism
A
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What is the fate of MIT and DIT after proteolysis from the thyroglobulin molecule in the follicular cells.
a) They undergo deiodination to form tyrosine and Iodide ions. b) Can be used up for the formation of new thyroglobulin molecule after deiodination. c) Can be excreted out of the cells d) Two of the above e) All of the above
Which is a food chain?
A. grass-grasshopper-horse B. fish-grasshopper-snake C. light-grass-human D. grass-cow-human
The two populations represented in boxes 1 and 2 of the figure
A. have different allele frequencies.
B. are genetically identical.
C. contain the same alleles.
D. are probably different species.
What are insect ears called?
a. Antennae b. Tympana c. Drummae d. Insects cannot hear