Escherichia coli uses mixed acid fermentation pathways that depend on which of the following enzymes?
A. Ammonia monooxygenase
B. Formate dehydrogenase
C. Pyruvate formate-lyase
D. C-type cytochrome
Ans:
B. Formate dehydrogenase
C. Pyruvate formate-lyase
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The eggs of birds and reptiles are telolecithal
____________________ Indicate whether the statement is true or false.
The beginning of anaphase is indicated by which of the following?
A) Chromatids lose their kinetochores. B) Cohesin attaches the sister chromatids to each other. C) Cohesin is cleaved enzymatically. D) Spindle microtubules begin to polymerize.
Any relationship in which one organism lives and feeds either inside or on the outer surface of another organism, harming the organism in the process, is classified as
a) commensalism b) parasitism c) none of the other choices d) mutualism
The chemical signal for slime mold amoebas to aggregate is:
a. cAMP. c. cGMP. b. cCMP. d. cTMP.