Which of the following is NOT true of what happens as mRNA prepares to leave the nucleus: A. A guanine cap and a poly-adenine tail are added to mRNA.
B. A spliceosome edits introns out of the mRNA sequence.
C. The material in the exons remains in the nucleus for recycling

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.