Which of the following statements about RNA polymerase in bacteria is INCORRECT?
A. It binds the promoter region of a gene.
B. It is bound to a sigma factor during initiation of transcription.
C. It synthesizes RNA.
D. It catalyzes the addition of nucleotides to the 5? end of a growing RNA strand.
E. It dissociates from the DNA at the terminator.
D. It catalyzes the addition of nucleotides to the 5? end of a growing RNA strand.
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All organisms in an ecosystem take part in a hierarchy of feeding relationships called __________. Fill in the blank(s) with the appropriate word(s)
Which of these contains two haploid nuclei?
a) the heterokaryotic stage of the fungal life cycle b) zygote c) spore-producing structures d) mycelium e) hypha
Which of the following infectious organisms is the smallest?
A.) Viroid B.) Prion C.) Virus D.) Bacteria
Iris is a long-day plant that normally flowers in the spring. Which regimen would be the most effective in making an iris bloom in late fall?
A) interrupting the plant's nights at 2:00 am with a flash of far-red light B) interrupting the plant's nights at 2:00 am with a flash of red light followed by a flash of far-red light C) interrupting the plant's nights at 2:00 am with a red flash, then a far-red flash, then a red flash D) interrupting the plant's days at 2:00 pm by putting it in the dark