The leading edge of a hypha is in the __________ stage of cell division
a. anaphase
b. interphase
c. metaphase
d. prophase
B
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In a cloning experiment, you use a vector that contains a lacZ gene as a selectable marker. If the competent cells are grown on X-Gal and IPTG, which colonies would contain chromosomal DNA?
A. The white colonies B. The blue colonies C. Half the total colonies D. None of the colonies
How many different amino acids could be encoded by the synthetic mRNA sequence 5' UGCUGCUGC 3'?
A) 0 B) 1 C) 2 D) 3 E) 6
Homeotic genes are, in general, in control of
a. X chromosome inactivation. b. formation of major body parts. c. methylation of nucleotides. d. dosage compensation. e. more than one of these
Which of the following are formed during the dissociation of carbonic acid as it occures in the tissue capillaries.
A) Water B) Bicarbonate ions C) Hydrogen ions D) Cardon dioxide