121. Which of the following elements does not contain neutrons?
Oxygen
Nitrogen
Hydrogen
Copper
122. Angstrom is a unit of
wavelength
energy
frequency
velocity
123. Frequency is measured in
Hertz
meter/second
radian
watt
124. Who discovered DNA?
James Watson and Francis Crick
Gregor Mendel
Johannsen
Hargovind Khorana
125. What is triglyceride?
Protein
Carbohydrate
Fat
Mineral
126. Electronencephalogram (EEG) is used in monitoring
heart
liver
pancreas
brain
127. Body temperature is regulated by
thalamus
hypothalamus
cerebellum
medulla
128. Choose the correct statement.
Wavelength of red light is less than violet light.
Wavelength of red light is more than violet light.
Wavelength of violet light is more than green light.
Wavelength of violet light is more than yellow light.
129. The value of 40 degrees Celsius in Fahrenheit scale is
104°F
100°F
102°F
75°F
130. The unit of electric power is
ampere
volt
coulomb
watt
131. In electrical motor
heat is converted into electrical energy
electrical energy is converted into heat
electrical energy is converted into mechanical energy
mechanical energy is converted into electrical energy
132. Human body contains
about 70% water
20% - 30% water
10% - 20% water
30% - 40% water
133. The device to measure electric current is
voltmeter
ammeter
voltameter
potentiometer
134. The main component of greenhouse gases is
carbon dioxide
methane
nitrous oxide
ozone
135. Einstein got the Nobel Prize for
Relativity
Bose - Einstein condensation
Mass - energy equivalence
Photoelectric effect
136. The powerhouse of cell is
cell wall
mitochondrion
ribosome
nucleus
138. Which instrument is used to measure humidity?
Hydrometer
Hygrometer
Pyrometer
Lactometer
139. What is the unit of pressure?
Newton/sq. meter
Newton-meter
Newton
Newton/meter
140. Which of the following has pH value 7?
Pure water
Neutral solution
Basic solution
Acidic solution
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