General Science MCQ Questions & Answers [PDF Download]
Which of the following best explains why the speed of sound is faster in solids than in gases?
In the electron transport chain during cellular respiration, what is the primary function of cytochrome c oxidase (Complex IV)?
Which type of chemical bond is primarily responsible for the secondary structure of proteins?
What is the primary reason why noble gases are chemically inert under normal conditions?
In which layer of the Earth's atmosphere does the ozone layer primarily exist, and what is its approximate altitude range?
What is the primary mechanism by which enzymes lower the activation energy of chemical reactions?
Which of the following quantum numbers can have half-integer values?
In plant photosynthesis, what is the primary function of the Calvin cycle?
What type of radioactive decay occurs when a nucleus has too many neutrons relative to protons?
Which of the following best describes the relationship between wavelength and frequency of electromagnetic radiation?
In DNA replication, what is the primary function of DNA helicase?
What is the primary factor that determines the color of a star?
In the periodic table, which property generally increases as you move from left to right across a period?
Which biomolecule primarily stores genetic information in prokaryotic cells?
What is the SI unit for measuring the intensity of radioactive decay?
In which phase of mitosis do sister chromatids separate and move to opposite poles of the cell?
What type of chemical reaction is represented by the following equation: 2H₂O₂ → 2H₂O + O₂?
Which force is responsible for keeping planets in orbit around the Sun?
What is the name of the process by which plants lose water vapor through their leaves?
Which type of rock is formed by the cooling and solidification of magma or lava?
In the human circulatory system, which chamber of the heart pumps oxygenated blood to the body?
What is the molecular formula for glucose?
Which principle explains why an airplane wing generates lift?
What is the term for the point in Earth's orbit when it is closest to the Sun?
Which organelle is responsible for cellular respiration in eukaryotic cells?
What is the pH of a solution with a hydrogen ion concentration of 1 × 10⁻⁹ M?
Which law of thermodynamics states that energy cannot be created or destroyed, only converted from one form to another?
What is the name of the reproductive structure in flowering plants that contains the ovules?
Which subatomic particle has no electric charge?
What is the term for the bending of light as it passes from one medium to another?