Which of the following is true about nucleic acids? I. Nucleic acids always consist of a five-carbon sugar, a nitrogenous base, and one or more phosphate groups. II. Both DNA, which stores genetic information and encodes protein sequences, and RNA, which is involved in the direct production of proteins, are nucleic acids. III. Nucleic acids are usually insoluble in water and are used for long term energy storage. IV. Glucose, cellulose, and starch are examples of nucleic acids found in most cells.