General Knowledge MCQs
Topic Notes: General Knowledge
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
1
What is 'Botany'?
Answer:
The scientific study of plants
Botany, also called plant science(s), plant biology or phytology, is the science of plant life and a branch of biology.
2
What is 'Geology'?
Answer:
The science that deals with the earth's physical structure and substance, its history, and the processes that act on it
Geology is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.
3
What is 'Biodiversity'?
Answer:
The variety of life in the world or in a particular habitat or ecosystem
Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level.
4
What is 'Solubility'?
Answer:
The ability of a substance (the solute), to mix into a liquid (the solvent)
Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent.
5
What is a 'Variable' in an experiment?
Answer:
Any factor, trait, or condition that can exist in differing amounts or types
A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.
6
What is 'DNA'?
Answer:
Deoxyribonucleic acid
DNA is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms.
7
What is a 'Black Hole'?
Answer:
A region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
8
What is the 'Ozone Layer'?
Answer:
A region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation
The ozone layer is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere.
9
What is 'Erosion'?
Answer:
The process of eroding or being eroded by wind, water, or other natural agents
Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust and then transports it to another location.
10
What is an 'Enzyme'?
Answer:
A substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions.