Which of the following is part of a DNA molecule?
A) sigma
B) RNA polymerase
C) transcription factor
D) promoter
E) activator
D
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A lizard's bobbing dewlap (a colorful flap of skin hanging from an Anolis lizard's throat) is an example of a(n) _____
A) stimulus B) reflex C) signal D) innate releasing mechanism E) structure necessary for respiration
John and all his brothers have no antibodies caused by non-functional B cells, thus they are highly
susceptible to bacterial infections. John and his brothers most likely have a condition called __________________. Fill in the blank(s) with the appropriate word(s).
Which of the following terms describes NO3- ? NO2- ? N2O ? N2?
A) ammonification B) denitrification C) nitrification D) nitrogen fixation E) anaerobic respiration
Atoms with eight electrons in their outer shells tend to:
A) form covalent bonds. B) be stable and unreactive. C) be chemically reactive. D) form ionic bonds.