They may contain cytocine. They have a purine or a pyramidine. They have one phosphate group. They contain one nitrogenous base. When nucleotides link up to form a single strand of RNA or DNA a. the adjacent nucleotides are held together by hydrogen bonds b. the adjacent nucleotides link together end to end c.
Chromatin consists primarily of a. carbohydrate b. lipid c. protein d.
A polypeptide chain which has regions of a helix and regions of b pleated sheets is further folded into a 3D structure and stabilized with H bonds, disulfide linkages, hydrophobic interactions, and ionic bonding. The nucleotide sequences of the two strands are complementary. One strand can serve as a template for the formation of the other strand. Identify the exergonic reaction. Organisms are described as thermodynamically open systems.