Which of the following is the correct structure of adenosine?

If $\alpha-D-(+)$-glucose is dissolved in water and kept for a few hours,the major constituent$(s)$ present in the solution is (are)

Which of the following molecules serves as fibrous content of food only and is useful for bowel movement in humans?

Number of optical isomers in the open chain structure of glucose is

Which of the following represents a nucleoside of $RNA$?

Hydrolysis of sucrose yields $......$.