How are the tails and heads of membrane phospholipids oriented in their environment?
A. The hydrophobic heads are oriented toward each other and the hydrophillic tails are oriented toward the extracellular fluid and the intracellular fluid.
B. The hydrophillic heads are oriented toward each other and the hydrophobic tails are oriented toward the extracellular fluid and the intracellular fluid.
C. The hydrophillic tails are oriented toward each other and the hydrophobic heads are oriented toward the extracellular fluid and the intracellular fluid.
D. The hydrophobic tails are oriented toward each other and the hydrophillic heads are oriented toward the extracellular fluid and the intracellular fluid.
Answer: D
You might also like to view...
Cells taken from a tumor
A. may be used to grow viruses. B. can be cultivated in vitro indefinitely. C. may be used to grow bacteriophages. D. divide 50 times and then die. E. may be used to grow viruses AND can be cultivated in vitro indefinitely.
In DNA, cytosine binds with
A) uracil. B) adenine. C) thymine. D) guanine.
Despite their diverse genome structures, viruses follow the central dogma of molecular biology
In order to undergo all processes within the viral replication cycle (e.g., replication, transcription, translation), what is the source that supplies all the necessary proteins and cellular machinery?
The process illustrated in the accompanying figure is representative of:
a. neuroendocrine signaling.
b. paracrine regulation.
c. cAMP as a second messenger.
d. classical endocrine signaling.
e. autocrine regulation.