Which of the following is NOT a typical characteristic of most bacterial plasma membranes?
A) site of energy production
B) composed of a phospholipid bilayer
C) contains proteins
D) contains cholesterol
E) is selectively permeable
D
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Algal blooms result when unusually high amounts of nutrients enter the sea from:
a. runoff from land. b. leaching from marine sediments. c. direct intentional dumping. d. input from wind. e. shipboard disposal at sea.
The primary building block (monomer) of nucleic acids is
A. a group of four interconnected rings. B. a nucleotide. C. an amino acid. D. a glucose molecule. E. a fatty acid.
Amniotes differ from earlier vertebrates by ____
a. their large size b. their three-chambered heart c. producing eggs in which the young can develop away from water d. the possession of a slimy skin e. having external scales
The __________ is a circular molecule of DNA that resides in a region of cytoplasm called the
__________. Fill in the blank(s) with the appropriate word(s).