Singer and Nicolson's fluid mosaic model of the membrane proposed that membranes_____
A) are a phospholipid bilayer between two layers of hydrophilic proteins
B) are a single layer of phospholipids and proteins
C) consist of protein molecules embedded in a fluid bilayer of phospholipids
D) consist of a mosaic of polysaccharides and proteins
C
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Which muscle is responsible for bending the leg at the knee and turning the foot downward?
a. Gastrocnemius b. Deltoid c. Biceps femoris d. Achilles tendon e. Latissimus dorsi
A lac I? mutant would
A) express lacZYA constitutively. B) not induce lacZYA in the presence of lactose. C) not have ?-galactosidase activity. D) not transport lactose into the cell effectively. E) not metabolize lactose.
Which of the following viruses did D. Ivanowski and M. Beijerinck work with?
A. Tobacco Mosaic Virus B. Epstein-Barr virus C. Rabies D. Smallpox E. Herpes
When New York City was given a choice to make regarding its drinking water
A. they chose ecosystem maintenance over development. B. they dug new and deeper wells rather than pay for desalinization. C. they had to construct expensive filtration plants to protect against disease. D. they chose ecosystem conversion to higher density housing for efficiency. E. they opted for more bottled water.