Cellular membranes are

A. solely composed of lipids.
B. composed of a single layer of amphipathic molecules.
C. found in eukaryotes, but not prokaryotes.
D. fluid.
E. selective to the transport of gases and small molecules only.


Answer: D

Biology & Microbiology

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The flow of hydrogen ions out of the thylakoid compartment:

a. provides energy to produce ATP molecules b. recharges the photosystems c. converts ATP into ADP d. causes excitation of chlorophyll molecules e. generates oxygen molecules

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Could two phenotypically normal parents have a child with cystic fibrosis?

a. Yes b. No

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For a given element, all atoms of that element

have the same number of

a. neutrons. b. electrons. c. protons. d. protons and neutrons. e. ions

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