The phospholipids of a cellular membrane will have their ____ ends facing each other (inside) and their ____ ends facing away from each other (outside). 

A. hypotonic, hypertonic
B. hypertonic, hypotonic
C. hydrophilic, hydrophobic
D. hydrophobic, hydrophilic


D. hydrophobic, hydrophilic

Biology & Microbiology

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Inactivation of a fluorescent dye in a very concentrated spot on a cell so that the fluidity of membranes can be visualized is called

A) liposome formation. B) SDS-PAGE. C) photobleaching. D) the freeze-fracture technique. E) ferritin-conjugated lectins.

Biology & Microbiology

Fructose and glucose are

a. isotopes. b. monosaccharides. c. disaccharides. d. six-carbon sugars. e. both monosaccharides and six-carbon sugars.

Biology & Microbiology

If a ball begins to roll down an incline, its ________ energy is converted into ________ energy.

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

Biology & Microbiology

RNA differs from DNA in that it uses the nitrogenous base ______ instead of ______.

A) adenine; cytosine B) uracil; guanine C) cytosine; guanine D) uracil; thymine E) adenine; uracil

Biology & Microbiology