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Main Subjects MCQs With Answers
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What term describes the movement of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration?
AFiltration
BDiffusion
COsmosis
DActive transport
What term describes the basic biological unit of heredity, made of DNA, that carries instructions for a specific inherited trait?
AEnzyme
BChromosome
CGene
DHormone
Which plant tissue is primarily responsible for transporting water and dissolved minerals upward from the roots to the rest of the plant?
AEpidermis
BXylem
CPhloem
DCambium
What causes the buildup of static electricity, such as when a balloon sticks to hair after rubbing?
ASudden temperature change
BTransfer of electric charge between surfaces through friction
CA chemical reaction between materials
DAbsorption of light energy
Which of the following is a typical physical property of most metals?
ABrittle and poor conductors of electricity
BMalleable, ductile, and good conductors of electricity
CAlways gases at room temperature
DAlways transparent
What is the main raw material used in the manufacturing of cement?
ALimestone
BSodium chloride
CSilica sand
DSulfur
What is the primary purpose of a lightning rod installed on tall buildings?
ATo provide a safe, low-resistance path for lightning current to reach the ground
BTo generate electricity from storms
CTo predict when lightning will strike
DTo attract more lightning strikes for research purposes
Which of the following is a typical physical property of most non-metals?
AExcellent conductors of electricity
BAlways found as liquids at room temperature
CPoor conductors of electricity and often brittle if solid
DMalleable and shiny
What do the letters N, P, and K represent on a common fertilizer label?
ANickel, platinum, and krypton
BNitrogen, phosphorus, and potassium
CNeon, phosphorus, and potassium
DNitrogen, plastic, and kerosene
What is the key difference between alternating current (AC) and direct current (DC)?
AAC periodically reverses direction, while DC flows in only one direction
BAC only exists in batteries, while DC only exists in power lines
CAC and DC are simply two names for the same type of current
DAC flows in only one direction, while DC periodically reverses direction