The visual deficit related to a misshapen cornea is ____
a. red-green color blindness
b. astigmatism
c. hyperopia
d. myopia
e. cataracts
ANSWER: b
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________ attaches DNA sequences at the ends of eukaryotic chromosomes.
A. Polymerase B. Ligase C. Telomerase D. Topoisomerase E. Primase
All blood cells and platelets originate from stem cells
a. true b. false
Which of the following is an important vasodilator in coronary arteries?
A) adenosine B) nitric oxide C) endothelin-1 D) oxygen E) bradykinin
Which of the following statements is TRUE regarding tuberculosis?
A) It occurs only in the lungs. B) Several hundred cells are required for infection. C) It remains viable in dried aerosol droplets for up to eight months. D) Only virulent strains of Mycobacterium tuberculosis produce mycolic acid. E) The immune system is not affected by the infection.