Which of the following is true of transcription?
a. in eukaryotic, transcription takes place in the cytoplasm
b. rna polymerse recognizes and binds to specific regions of the dna called introns
c. rna editing removes the exons from pre-mrna, leaving only the introns in the final molecule
d. rna polymerse can make many molecules of rna from a single dna sequence.

Asingle-molecule microscopy experiment is performed on a slide containing 1000 molecules each of green, red, cyan, and yellow fluorescent proteins (gfp, rfp, cfp, and yfp, respectively). the experiment measures the number of antibodies bound to each type of protein, finding that 900 molecules of gfp, 10 of rfp, 1 of cfp, and 3 of yfp are bound at 1 nm concentration of antibody. a. what is the specificity of the antibody for gfp? b. what is the kd of the gfp–antibody interaction?