The primary lipid components of the membranes of extreme thermophiles are ________.
A. C20 diglycerol diethers
B. sulfolipids
C. cholesterol
D. C40 isoprenoid tetraethers
Answer: D
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Which statement does not represent one of Darwin's observations?
a. All individuals have an equal chance to survive and reproduce. b. Changes in populations are gradual and take place over long periods of time. c. Members of the same species may exhibit considerable variation. d. Some characteristics are heritable and passed on to offspring. e. Some characteristics afford their possessor a better chance of survival.
Localized regions of plasma membranes that contain cholesterol and proteins involved in cell signaling are known as
A) gap junctions. B) arterial plaques. C) cadherin junctions. D) lipid rafts. E) plasmodesmata.
The information storage molecules of cells are called:
A. enzymes. B. hormones. C. nucleic acids. D. proteins. E. phospholipids.
In studies of human genetics, usually a single individual brings the condition to the attention of a scientist or physician. When pedigrees are developed to illustrate transmission of the trait, what term does one use to refer to this individual?
A) proband B) cousin C) F1 B D) child E) mutant