☰ Menu

Place for ads

MCQs -for Competitive Exams & Improve Knowledge

Looking for MCQs? You're in the right place! Whether you're preparing for competitive exams, school boards or just aiming to improve your knowledge, we offer MCQs for all levels and subjects.

All AbbreviationsArt and CultureAwardsBooks and AuthorsCapitalsClimate / EnvironmentComputer AwarenessConstitutionCurrenciesDanceDefence and WarsDiscoveriesEminent PersonalitiesFreedom MovementGeographyHeritageHistoryLanguagesNational SymbolsScienceSports and Championships

Which element is a key component of all proteins?

  • (A) Carbon
  • (B) Nitrogen
  • (C) Oxygen
  • (D) Hydrogen

Answer: Nitrogen

Nitrogen is a vital component of amino acids, which are the building blocks of proteins.

What is the most abundant element in the human body?

  • (A) Oxygen
  • (B) Carbon
  • (C) Hydrogen
  • (D) Nitrogen

Answer: Oxygen

Oxygen makes up about 65% of the human bodys mass, primarily in water and in the respiratory system.

What is the study of living organisms called?

  • (A) Biology
  • (B) Chemistry
  • (C) Physics
  • (D) Geology

Answer: Biology

Biology is the branch of science that studies living organisms, their structure, function, growth and evolution.

Place for ads

What is the pH value of a neutral substance?

  • (A) 7
  • (B) 10
  • (C) 0
  • (D) 14

Answer: 7

A pH of 7 is considered neutral, meaning the substance is neither acidic nor basic.

What is the process by which water moves through a plant?

  • (A) Transpiration
  • (B) Absorption
  • (C) Evaporation
  • (D) Photosynthesis

Answer: Transpiration

Transpiration is the process by which water is absorbed by the roots, moves through the plant and is released as vapor through the leaves.

Which part of the cell is responsible for producing proteins?

  • (A) Nucleus
  • (B) Mitochondria
  • (C) Ribosome
  • (D) Endoplasmic reticulum

Answer: Ribosome

Ribosomes are responsible for synthesizing proteins by translating messenger RNA into amino acid sequences.

Place for ads

What is the process of converting a liquid into a gas called?

  • (A) Freezing
  • (B) Condensation
  • (C) Melting
  • (D) Evaporation

Answer: Evaporation

Evaporation is the process where a liquid changes into a gas, usually due to the addition of heat.

What is the SI unit of mass?

  • (A) Kilogram
  • (B) Gram
  • (C) Pound
  • (D) Ounce

Answer: Kilogram

The SI unit of mass is the kilogram (kg), which is used to measure the amount of matter in an object.

What is the function of the mitochondria in the cell?

  • (A) Protein synthesis
  • (B) Energy production
  • (C) Cell division
  • (D) Transport

Answer: Energy production

Mitochondria generate energy in the form of ATP through cellular respiration, providing energy for cell functions.

Place for ads

Which type of cell division produces gametes?

  • (A) Mitosis
  • (B) Meiosis
  • (C) Binary fission
  • (D) Budding

Answer: Meiosis

Meiosis is the process that produces gametes (sperm and egg cells) with half the number of chromosomes.

Previous1011121314Next

Place for ads

Subscribe to Our Newsletter