Which of the following is the major lipid found in membranes?
A. steroids
B. cholesterol
C. triglycerides
D. phospholipids
E. saturated fatty acids
D. phospholipids
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Algin is a substance used to thicken products as diverse as ice cream, cosmetics, and floor polish. It is extracted from
the cell walls of ____ algae.
a. green b. golden c. blue-green d. brown e. red
Bacterial resistance to penicillin began to appear
a. several decades after its first use. b. 100 years after its first use. c. after the drug supply was largely from synthetic sources. d. during the AIDS outbreak in the 1980s. e. within a few years of its introduction into general use.
In the heart, blood travels laterally from the right chambers to the left chambers through the septum.
a. true b. false
One-third of all cancer deaths are due to mutations that arise from smoking tobacco.
Answer the following statement true (T) or false (F)