Base pairs in DNA are attracted to each other by
A. ionic bonds.
B. covalent bonds.
C. hydrogen bonds.
D. unzipping enzymes.
C. hydrogen bonds.
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Neurotransmitters are stored in vesicles located within axon terminals
Indicate whether the statement is true or false.
Most animal fats form a solid at room temperature, while plant fats remain liquid at room temperature. Which of the following is a feature of lipids in plant membranes that best explains this difference?
(a) unsaturated hydrocarbons (b) longer hydrocarbon tails (c) higher levels of sterols (d) larger head groups
Which of the following would increase the electrochemical gradient across a membrane?
A) a sucrose-proton cotransporter B) a proton pump C) a potassium channel D) both a proton pump and a potassium channel
In general, the term ________________ is used to describe disease causing agents.
Fill in the blank(s) with the appropriate word(s).