Which particle mediates electromagnetic force? A. Gluon B. Photon C. W boson D. Higgs Explanation: Photons are force carriers of EM interaction.
Which process causes plate movement? A. Radiation B. Mantle convection C. Erosion D. Deposition Explanation: Heat-driven convection moves plates.
Which base pairs with adenine in DNA? A. Cytosine B. Guanine C. Thymine D. Uracil Explanation: A pairs with T in DNA.
Which factor increases reaction rate? A. Lower temperature B. Higher activation energy C. Catalyst D. Decreasing concentration Explanation: Catalyst lowers activation energy.
Which equation describes wave speed? A. (v = f\lambda) B. (v = at) C. (v = u + at) D. (v = s/t) Explanation: Wave speed equals frequency times wavelength.
Which rock type forms from cooling magma? A. Sedimentary B. Metamorphic C. Igneous D. Clastic Explanation: Igneous rocks form from molten material.
Which process generates ATP in mitochondria? A. Glycolysis B. Krebs cycle C. Oxidative phosphorylation D. Fermentation Explanation: Electron transport chain drives ATP synthesis.
Which has highest lattice energy? A. NaCl B. MgO C. KBr D. CaCl₂ Explanation: Higher charge ions yield stronger attraction.
Which frame is non-inertial? A. Constant velocity frame B. Rotating frame C. Free-fall frame D. Spacecraft coasting Explanation: Rotating frames experience fictitious forces.
Which process removes CO₂ from atmosphere long-term? A. Photosynthesis B. Respiration C. Ocean dissolution D. Silicate weathering Explanation: Weathering locks carbon in rocks.