Natural Science MCQs

Questions and Answers (91–120)

91. Which organ in the human body produces bile?

Answer: Liver

92. Which planet is known as the "Evening Star"?

Answer: Venus

93. What is the largest gland in the human body?

Answer: Liver

94. Which blood cells are responsible for immunity?

Answer: White blood cells

95. What is the SI unit of electric potential difference?

Answer: Volt

96. Which layer of the Earth lies between the crust and core?

Answer: Mantle

97. What is the main function of chlorophyll?

Answer: Absorption of sunlight for photosynthesis

98. Which type of energy is possessed by a moving object?

Answer: Kinetic energy

99. What is the process by which plants make food using sunlight?

Answer: Photosynthesis

100. What is the SI unit of velocity?

Answer: Meter per second (m/s)

101. Which part of the human brain controls balance and coordination?

Answer: Cerebellum

102. Which gas is responsible for the greenhouse effect?

Answer: Carbon dioxide

103. Which instrument is used to measure atmospheric pressure?

Answer: Barometer

104. What is the basic unit of heredity?

Answer: Gene

105. Which scientist proposed the laws of motion?

Answer: Isaac Newton

106. What is the chemical symbol for sodium?

Answer: Na

107. Which planet is the largest in the solar system?

Answer: Jupiter

108. What is the SI unit of luminous flux?

Answer: Lumen

109. Which process converts glucose into energy in cells?

Answer: Cellular respiration

110. What is the unit of work in physics?

Answer: Joule

111. Which metal is commonly used in electrical wiring?

Answer: Copper

112. Which gas is used in fire extinguishers?

Answer: Carbon dioxide

113. What is the process of cell division in somatic cells called?

Answer: Mitosis

114. What is the boiling point of water at sea level?

Answer: 100°C

115. Which vitamin helps maintain healthy eyesight?

Answer: Vitamin A

116. What is the largest internal organ in the human body?

Answer: Liver

117. Which instrument measures earthquakes?

Answer: Seismograph

118. Which planet has the strongest gravitational pull?

Answer: Jupiter

119. Which gas is essential for combustion?

Answer: Oxygen

120. What is the study of fossils called?

Answer: Paleontology