A water molecule is polar because
a. the oxygen atom is a negative ion and the
hydrogen atoms are positive ions.
b. both the oxygen and the hydrogens are
negatively charged.
c. oxygen has a magnetic charge.
d. the electrons of the hydrogen atoms are
pulled to the oxygen atom.
e. hydrogen has a stronger pull on the
electrons than does oxygen
D
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Persons infected with HIV often die of opportunistic diseases because
A. HIV can transduce other viruses into virulent strains. B. HIV destroys T cells. C. HIV binds to antibodies. D. HIV is a retrovirus. E. HIV mutates easily.
What do tarsiers and giant squids have in common?
a. They are both active during daytime as well as at night. b. They both live in water. c. They are both active during daytime. d. They are both nocturnal.
Of the different pathways to activate the 'Complement Cascade', both the lectin and the alternate pathways are considered a pure innate immunity response.
a. true b. false
How many ATP molecules are produced by glycolysis?
A) 1 B) 2 C) 3 D) 4 E) 5