Questions

In the early 1950s two scientists, Rosalind Franklin and Maurice Wilkins, studied DNA using x-rays. Franklin produced an x-ray photograph that allowed two other researchers, James Watson and Francis Crick to work out the 3D structure of DNA. The structure of DNA was found to be a double helix.

Sunderbans is the name given to the dense impenetrable  tidal/ mangrove forest of Ganges-Brahmaputra delta because of abundant sundari trees found here.

The 'sphinx' is a mythological animal with the body of a lion and the head of man. Each Sphinx was carved out of a single solid stone.

Russi Mody

A computer has two types of memory.

1. Non-volatile and

2. Volatile.

Volatile memory is computer memory that requires power to maintain the stored information.

* It is a temporary memeory which cannot contain information permanently.

Example :: RAM or Random Access Memory

Non-volatile memory is computer memory that can retain the stored information even when not powered.

* It is a permanent memory in which data is stored in permanently.

Examples :: Hard disc, ROM, Floppy discs, Magnetic tape,...