Lipid bilayers spontaneously form to orient the _____________ tails _____________ to minimize their contact with water
A. hydrophilic; outside
B. hydrophilic; inside
C. hydrophobic; outside
D. hydrophobic; inside
Answer: D
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Examine the figure and statements below. Which one of the statements is incorrect?
A. mRNA for caudal and hunchback are evenly distributed in the oocyte, but bicoid and nanos mRNA are located either anteriorly or posteriorly, respectively. B. Bicoid protein promotes the transcription of the hunchback gene in the anterior region of the embryo. C. Nanos protein represses the translation of hunchback mRNA in the posterior region of the embryo. D. Bicoid protein represses the translation of caudal mRNA in the anterior region of the embryo. E. The expression pattern of Caudal and Hunchback proteins is an example of gene regulation at the level of translation.
Duchenne muscular dystrophy is caused by a mutation that ____
a. b. weakens myofibrils c. decreases the transmission of force d. disrupts the sarcomere e. increases the transmission of force
The height at which green anoles and brown anoles perch in trees overlaps a bit. When brown anoles were introduced to islands inhabited by green anoles, the green anoles evolved a higher number of specialized toe scales in order to perch higher than they previously did when they were the sole species on the island. This is an example of:
A. Interference competition B. Ecological character displacement C. Ecological release D. Escape-and-radiate coevolution
A shared characteristic of eukaryotes and prokaryotes is __________.
a. a cell membrane b. a nucleus c. membrane-bound organelle d. a well-developed cytoskeleton e. an ability to change shape as they feed, move, or grow