Biology MCQ Question and Answer
Biology MCQ Question and Answer
122. Kidneys are vital organs of the body because they help in—
- Regulation of body fluids
- Regulation of acid-base balance
- Removal of metabolic wastes
- All of these functions
125. June 21 is the longest day of the year for those living in the Northern hemisphere. What is the shortest day of the year for those living in the Southern hemisphere ?
- March 21
- September 21
- December 21
- June 21
126. Liberhan Commission has been appointed to deal with which one of the following ?
- Anti-Sikh Riots, 1984
- Demolition of Babri Masjid
- Godhra Incident
- Mumbai Communal Riots
127. Ordinary table salt is sodium chloride. What is baking soda?
- Potassium chloride
- Potassium carbonate
- Potassium hydroxide
- Sodium bicarbonate
128. Ozone hole refers to
- hole in ozone layer
- decrease in the ozone layer in troposphere
- decrease in thickness of ozone layer in stratosphere
- increase in the thickness of ozone layer in troposphere
130. Movement of cell against concentration gradient is called
- osmosis
- active transport
- diffusion
- passive transport