According to the fluid mosaic model of cell membranes, phospholipids _____
A) can move laterally along the plane of the membrane
B) frequently flip-flop from one side of the membrane to the other
C) occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane
D) have hydrophilic tails in the interior of the membrane
A
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Transplantation of tissue from the same individual
An example of a retrovirus in the human genome is the ________ family of sequences.
Fill in the blank(s) with the appropriate word(s).
All steroids have ____
a. the same number of double bonds b. one or more fatty acids c. four rings of carbon to which other atoms are attached d. the same functional groups e. the same number and positions of double bonds
Serotonin is amine neurotransmitter that is derived from (i)__________, and it is deactivated by (ii)___________.
a) (i) tyrosine, (ii) tyrosine hydroxilase b) (i) tryptophan, (ii) moniamine oxidase