Down syndrome is a/an

• Infectious disease
• Genetic disease
• Epidemic disease
• Mutated disease
Correct Option: B  [ Genetic disease ]

Remark: A genetic condition caused by having an extra chromosome 21 in some or all of the body's cells.

Which of the following micro-organism causes diseases like polio and chicken pox?

• Bacteria
• Protozoa
• Algae
• Virus
Correct Option: D  [ Virus ]

Remark:

Ocean thermal energy is due to:

• tides in the ocean
• pressure difference at different levels in the ocean
• temperature difference at different levels in the ocean
• energy stored by waves in the ocean
Correct Option: C  [ temperature difference at different levels in the ocean ]

Remark:

Quality of petrol is expressed in:

• Gold number
• Cetane number
• Methane number
• Octane number
Correct Option: D  [ Octane number ]

Remark:

An alternating current instead of direct current is used in long-distance electric transmission because:

• it is easy to generate
• rectification is possible
• energy losses are minimum
• it causes fewer accidents
Correct Option: C  [ energy losses are minimum ]

Remark:

Oxygen liberated during photosynthesis comes from:

• water
• carbon dioxide
• glucose
• Both carbon dioxide and glucose.
Correct Option: A  [ water ]

Remark:

Montreal Protocol is related to:

• Ozone depletion
• Bio-diversity
• Biological weapons
• European Community
Correct Option: A  [ Ozone depletion ]

Remark:

Which of the following processes is responsible for transforming liquid into vapour ?

• Condensation
• Evaporation
• Transpiration
• Sublimation
Correct Option: B  [ Evaporation ]

Remark:

An instrument used for measuring depth of an ocean is called?

• Hydrometer
• Hygrometer
• Fathometer
• Galvanometer
Correct Option: A  [ Hydrometer ]

Remark:

Which among the following helps in circulation of blood ?

• Arithrocytes
• Blood platelets
• Monocytes
• Lymphocytes
Correct Option: D  [ Lymphocytes ]

Remark: