661: Which one of the following languages belongs to the Austric group ?
(a) Marathi
(b) Ladakhi
(c) Khasi
(d) Tamil
662: Who among the following was selected for the 2001 Dada Saheb Phalke Award?
(a) Dev Anand
(b) Lata Mangeshkar
(c) Ramanand Sagar
(d) Yash Chopra
663: Which Mughal ruler introduced the Mansabdari system in India?
(a) Akbar
(b) Humayun
(c) Shahjahan
(d) Babar
664: 'RNA interference (RNAi)' technology has gained popularity in the last few years. Why?
1. It is used in developing gene silencing therapies.
2. It can be used in developing therapies for the treatment of cancer.
3. It can be used to develop hormone replacement therapies.
3. It can be used to produce crop plants that are resistant to viral pathogens.
Select the correct answer using the code given below.
(a) 1, 2 and 4
(b) 2 and 3
(c) 1 and 3
(d) 1 and 4 only
665: The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
(a) Ice is a bad conductor of heat
(b) Since the surface of the lake is at the same temperature as the air, no heat is lost
(c) The density of water is maximum at 4 degree celcius
(d) None of the statements (a), (b) and (c) given above is correct.