541: With reference to medieval Indian rulers, which one of the following statements is correct ?
(a) Alauddin Khalji first set up a separate ariz's department
(b) Balban introduced the branding system of horses of military
(c) Muhammad bin Tughlaq was succeeded by his uncle to the Delhi throne
(d) Firoz Tughlaq set up a separate department of slaves
542: Assertion (A):
Scientists can cut apart and paste together DNA molecules at will, regardless of the source of the molecules.
Reason (R):
DNA fragments can be manipulated using restriction endonucleases and DNA ligases.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is NOT a correct explanation of A
(c) A is true but R is false
(d) A is fasle but R is true
543: What is the shortest route from Moscow to San Francisco?
(a) Moscow to Europe, crossing Atlantic and East coast of North America
(b) Over the North pole and over Canada and crossing Pacific
(c) Moscow to Siberia to Japan and crossing Pacific
(d) Moscow to Europe to Greenland, crossing Atlantic and then North America
544: Banjaras during the medieval period of Indian history were generally
(a) agriculturists
(b) warriors
(c) weavers
(d) traders
545: In the case of a Test-tube baby
(a) fertilization takes place inside the test-tube
(b) development of the baby taken place inside the test-tube
(c) fertilization takes place outside the mother's body
(d) unfertilized egg develops inside the test-tube