Health workers working with diphtheria commonly receive a serum with antibodies against the pathogen. What type of immunity would this be?
a. active, natural immunity
b. passive artificial immunity
c. active, artificial immunity
d. passive, natural immunity
Ans: b. passive artificial immunity
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A trace element is one found in specific organisms in ____ quantities and is ____ for normal biological functions
a. moderate; unnecessary b. moderate; vital c. small; unnecessary d. large; unnecessary e. small; vital
What is a noncoding, repetitive DNA sequence at the end of chromosomes?
a. telomere b. guanine cap c. transposons d. telomerase e. tandem repeats
____ is(are) NOT directly involved with transcription.
A. Unzipping enzymes B. RNA polymerase C. Amino acids D. DNA
Urine when compared with the initial filtrate, contains
a. more glucose b. less water, fewer minerals, and more urea c. decomposed of red blood cells d. concentrated amino acids