Where does the fertilization of the egg occur?
A) Ovary
B) Oviduct
C) Uterus
D) Cervix
B
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Extracellular glucose inhibits transcription of the lac operon by _____
A) strengthening the binding of the repressor to the operator B) weakening the binding of the repressor to the operator C) inhibiting RNA polymerase from opening the strands of DNA to initiate transcription D) reducing the levels of intracellular cAMP
Under the influence of hormones, branch roots emerge from the ________ of a growing root
A) epidermis B) Casparian strip C) endodermis D) pericycle E) central cylinder
In the Fite method, the organisms stain:
a) red b) blue c) green d) black
Characteristics of Treponema pallidum, the bacterium which causes syphilis, include all except
A) vertical transmission to a fetus during any stage of pregnancy. B) ability to avoid immune detection by varying the few antigens it carries on its surface. C) not treatable with any of type antibiotic. D) rapid invasion of host tissues from the initial infection site. E) Gram-negative spirochete.