Given all of the instrumental methods you have learned, explain the method (including detection method) you would use in each situation described below: a. Creatinine level in blood -Infrared spectroscopy
b. PBDE in food samples- GC-MS
c. Calcium content in urine-AAS
d. Free fatty acids in food samples- Florescence spectroscopy
e. Caffeine in coffee samples-HPLC.

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions, because prokaryotes don't have nuclei.

Why are common names a problem for scientist?

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?