Which vitamin is called ascorbic acid? What are its physiological functions? Which disease is caused by the deficiency of this vitamin?

Explain the following:
Glucose responds Fehling solution and osazone, it does not react with Schiff’s base and sodium bisulphite.

Explain the following:
Glucosides react neither with Fehling solution nor with Tollen's reagent. They also do not allow mutarotation.

Explain the following:
Although fructose does not have an aldehydic group, it reacts with Fehling solution.

What is melting temperature (T_m) of DNA? A DNA molecule with more number of GC base pairs than AT base pairs has higher T_m than the one with lesser number of GC base pairs than AT base pairs. Explain why?

What are forces holds the two strands of DNA together in a double-helix structure? Draw structure to show the bonding between adenine and thymine, and between guanine and cytosine.

'DNA replication is semi-conservative'. Explain.

What is transcription with reference to protein synthesis? How does it take place?