In secondary active transport, the movement of materials is driven by energy though no ATP (adenosine triphosphate) is expended. What is the source of energy that is driving secondary active transport?
a. The glucose involved in transport can be utilized as an energy source to drive the pump during secondary transport.
b. As a secondary energy source, the cell can use the potential energy found in proteins.
c. The electrochemical gradient created during primary active transport creates potential energy that translates to kinetic energy.
d. Because the membrane is a phospholipid bilayer, it has plenty of lipids on hand to use as energy to drive secondary active transport.
c. The electrochemical gradient created during primary active transport creates potential energy that translates to kinetic energy.
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Translation is the process by which:
A. proteins are synthesized from RNA molecules. B. RNA is synthesized from protein. C. proteins are synthesized from DNA molecules. D. RNA is synthesized from DNA. E. DNA is synthesized from protein.
The portion of a mushroom that you typically eat is
a. the fruiting body. b. the reproductive structure. c. the chytrid sac. d. both the fruiting body and the reproductive structure.
A scientist who examines the distributions of species around the world is most likely studying ____
a. taxonomy b. paleobiology c. biogeography d. natural theology e. natural history
During cytotoxic T cell attack of a target cell, which one of the following is released to pierce the cell membrane of the foreign cell, which ultimately kills the target cell?
A) interferon B) eosinophil C) histamine D) perforin E) antibody