U937d cells express high levels of creatine kinase (ck‑b) mrna but do not translate the mrna into protein. ribosomes bind the 5' end of the ck‑b mrna; however, translation into protein is repressed in these cells. u937d cells synthesize the ck‑b enzyme when researchers introduce numerous short segments of rna containing 3' utr consensus sequences into the cells. the total amount of ck‑b mrna does not change after adding rna containing 3' utr sequences. introducing short rna segments without the 3' utr consensus sequences does not stimulate ck‑b synthesis. which of the statements explains how the introduction of short rna containing 3' utr sequences allows ck‑b translation in u937d cells? .explain how the introduction of short segments of rna containing the 3'utr sequences might remove the inhibition.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.