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.

Biology & Microbiology

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Neurotransmitters are stored in vesicles located within axon terminals

Indicate whether the statement is true or false.

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

In general, the term ________________ is used to describe disease causing agents.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology