What is common in AIDS, hepatitis and typhoid fever ?

• All are bacterial disease
• All are water borne diseases
• All are viral disease
• All are spread by human beings
Correct Option: D  [ All are spread by human beings ]

Remark:

Magnetic effect of current gives rise to which force ?

• mechanical
• frictional
• spring
• gravitational
Correct Option: A  [ mechanical ]

Remark:

Who discovered Electron?

• Enrico Fermi
• Robert Noyce
• J.J.Thomson
• James Dyson
Correct Option: C  [ J.J.Thomson ]

Remark:

Which of the following lenses would you prefer to read small letters in a dictionary ?

• A convex lens of focal length 50 cm
• A concave lens of focal length 50 cm
• A convex lens of focal length 5 cm
• A concave lens of focal length 5 cm
Correct Option: C  [ A convex lens of focal length 5 cm ]

Remark:

Shadows are formed when a __________ object comes in the path of light.

• Opaque
• Transparent
• Luminous
• Translucent
Correct Option: A  [ Opaque ]

Remark:

Which of the following cell organelles is referred to as the 'suicidal bags' or 'disposal units' ?

• Lysosome
• Peroxisomes
• Glyoxisomes
• Mitochondria
Correct Option: A  [ Lysosome ]

Remark:

Which one of the following animals is not "warm-blooded"?

• Hen
• Tiger
• Bat
• Toad
Correct Option: D  [ Toad ]

Remark: frogs and toads are cold-blooded. This means their body temperatures change to match the temperatures of their environment.

Penicillin was invented by:

• Christian Bernard
• Alexander Fleming
• Mc Collum
• William Harvey
Correct Option: B  [ Alexander Fleming ]

Remark:

What happens to a person who receives the wrong type of blood?

• all the arteries constrict
• all the arteries dialate
• the RBCs agglutinate
• the spleen and lymph nodes deteriorate
Correct Option: C  [ the RBCs agglutinate ]

Remark:

Which one is a water soluble vitamin?

• Vitamin A
• Vitamin C
• Vitamin K
• Vitamin D
Correct Option: B  [ Vitamin C ]

Remark: