All of the following combinations are possible in the gametes of an organism that is AaBb EXCEPT
A) AB. B) aB. C) ab. D) Ab. E) aa.
E
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Agarose is considered a polysaccharide because:
a. It is comprised of amino acid subunits. b. It is comprised of two simple sugars. c. It is comprised of many simple sugars. d. None of the above.
Which of the following nucleotide bases are present in equal amounts in DNA
a) adenine and guanine b) adenine and cytosine c) thymine and cytosine d) adenine and thymine e) thymine and guanine
A urine specimen from a maternity patient with the complaint of cystisis was recieved in the lab. The culture of tis sample grew a lactose- positive. Gram negative bacillys that was presumtively identified as E. Coli. On differential and selective media this organism would demonstrate which reaction?
A. Hektoen Enteric Agar= green/colorless colonies with black centers B. MacConkey Agar= Colorless colonies C. xylose-lysine-Desoxycholate Agar= yellow colonies D. Xylose-Lysine Desoxychocolate Agar= colorless colonies
Which of the following diagnostic procedures depends on precipitation of antigen-antibody complexes?
A. blood typing B. immunodiffusion C. viral hemagglutination inhibition tests used to diagnose viral infections D. ELISA E. fluorescent antibody tests