1531. Information can be sent over long distance in the form of :

A. Electrical signals through wires
B. Light signals through optical fibre
C. Radio waves through air
D. Any combination of these three *

1532. Information can be stored in :

A. Audio and video cassettes
B. Floppy and compact discs
C. Hard Disks
D. Laser and optical discs
E. All of the above *

1533. Computer can :

A. Add and subtract information only
B. Add, Subtract and sort information only
C. Add,Subtract sort and classify information *
D. None of the above

1534. IBM stands for :

A. International business machines *
B. International big machines
C. Interrelated big machines
D. None of these

1535. Chemicals used to kill weeds are called as :

A. Insecticides
B. fungicides
C. Hebicides *
D. Fumigants

1536. The cytoplasm consists of several types of structures, which are called :

A. Protoplasm
B. Nucleus
C. Cytochromes
D. Organelles *

1537. The structure of DNA was elaborated by watson and crick in :

A. 1909
B. 1923
C. 1945
D. 1953 *

1538. In a DNA molecule, the rule for bas pairing is:

A. Adenine always bound with thymine and cytosin with guanine *
B. Adenine is always bound to cytosine, and thymine is always bound to guanine.
C. Adenine is always bound to cytosine, and thymine is always bound to cytosine.
D. None of these

1539. Man belongs to the family :

A. Felidae
B. Hominidae *
C. Mammalia
D. Primataceae

1540. Deficiency of vitamin c in the human body causes a deficiency disease called :

A. Beriberi
B. Night blindness
C. Rickets
D. Scurvy *