A22-year-old female comes to your office with complaints of right lower quadrant abdominal pain, which has been worsening over the last 24 hours. on examination of the abdomen, there is a palpable mass and rebound tenderness over the right lower quadrant. the clinician should recognize the importance of:

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.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.