The part of a membrane protein that extends through the phospholipid bilayer is primarily composed of amino acids that are
A. highly polar.
B. positively charged.
C. negatively charged.
D. nonpolar.
E. water soluble.
Answer: D
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The separate feeding locations of these five warbler species on different portions of the same tree illustrates:
A. biotic transformation. B. competitive exclusion. C. resource partitioning. D. top-down population regulation.
What is the complementary DNA strand to 5?-ATTCGGTGA-3??
A. 5?-TAAGCCACT-3?. B. 3?-CGGATTGTC-5?. C. 5?-CGGATTGTC-3?. D. 3?-TAAGCCACT-5?. E. 3?-ATTCGGTGA-5?.
A passageway shared by the digestive and respiratory systems is the ________
A) larynx B) pharynx C) sinuses D) esophagus
Proteins with positive charges that are wrapped around DNA within chromosomes are
A. centromeres. B. chromatids. C. histones. D. kinetochores.