Characterize second messengers
What will be an ideal response?
For some hormones, the receptor is in the target cell's plasma membrane, and binding to the hormone causes the production of various molecules inside of the cell. These second messengers cause a series of chemical reactions that result in the desired action.
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Racker and Stoeckenius used synthetic phospholipid membrane vesicles that contained a light-activated protein pump
and ATP synthase to test Mitchell's chemiosmotic hypothesis. What was the conclusion of this experiment?
a. Phospholipid membrane vesicles require a proton gradient to maintain integrity. b. ATP synthase is powered by the proton-motive force. c. ATP synthase can generate a proton gradient. d. Light-activated proton pumps can generate a proton gradient. e. Light-activated proton pumps interact with ATP synthase to modulate its activity.
What kind of bond exists between two amino acids
in a protein? a. peptide b. ionic c. hydrogen d. amino e. sulfhydroxyl
What is a key trait of a multicellular organism?
a. The organism has many cells. b. All the organism's cells have the same function. c. A division of labour exists among the organism's cells. d. All the organism's cells are similar in shape.
DNA that contains "foreign" genes from another organism
A. is called RNA. B. is called recombinant DNA. C. has experienced a point mutation. D. can no longer function as a genetic blueprint.