How many domains contain prokaryotic organisms?
A) One
B) Two
C) Three
D) Four
B
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Which of the following statements is NOT true?
a. A lipid bilayer is characteristic of all membranes. b. Cellular organelles are associated with membranes. c. In a plasma membrane, a hydrophilic portion is oriented to the outside of the cell. d. Lipid molecules make the cell membrane relatively impermeable to water-soluble substances. e. Even by using extremely high magnification, an electron microscope cannot reveal the substructure of cell membranes.
The range of the sugar maple could decrease in response to warming due to climate change.
Answer the following statement true (T) or false (F)
Select the true statement about the proton motive force
A) The proton motive force always involves the inner mitochondrial membrane. B) The proton motive force involves a pH gradient component. C) The proton motive force can be used for active transport processes. D) The proton motive force involves movement of hydrogen ions across the nuclear membrane by the electron transport chain. E) The proton motive force involves a pH gradient component AND the proton motive force can be used for active transport processes.
Type IV secretion systems are potentially applicable to treatment of human disease by using them to deliver DNA to target cells in human gene therapy.
Answer the following statement true (T) or false (F)