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Biology MCQs

Biology MCQs are multiple-choice questions on living organisms, covering cells, genetics, plant and animal physiology, microorganisms, ecology and evolution. This collection helps MDCAT, NEET UG and competitive exam candidates revise core life science concepts quickly. Every question shows its correct answer instantly, so you can check your understanding and move on without waiting.

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About Biology MCQs

This Biology section brings together questions from almost every branch of the subject. You will find items on cell structure and biomolecules, DNA and Chargaff's rules, bacteriophage life cycles, the nervous system and resting membrane potential, kidney nephrons and excretion, and plant transport such as the Casparian strip in root endodermis. Botany topics include bryophyte life cycles, photosynthetic pigments and fungal hyphae, while zoology questions cover insects, embryonic induction and animal behaviour.

Biology carries heavy weight in medical entry tests and appears regularly in the everyday science papers of public service commissions. Many questions test precise terms, for example the difference between symplast and apoplast pathways or between Lamarck's and Darwin's ideas of evolution. Practising a large, mixed bank like this trains you to recall definitions accurately, spot incorrect statements and handle the assertion-style questions that examiners often use.

Key facts to remember

  • The mitochondrion is the site of aerobic respiration and produces most of the cell's ATP.
  • Chargaff's rule states that in DNA adenine equals thymine and guanine equals cytosine.
  • The Casparian strip in the root endodermis blocks the apoplast pathway of water movement.
  • Lamarck proposed that evolution occurs through inheritance of acquired characteristics.
  • Insects have three pairs of jointed legs, each made of five main segments.
  • Chlorophyll a is blue-green in colour, while chlorophyll b is yellow-green.

Exams that include Biology MCQs

Pakistan

  • MDCAT
  • CSS
  • PMS
  • FPSC
  • PPSC
  • NTS
  • Educators/teaching tests (SST, EST)

India

  • NEET UG
  • UPSC CSE
  • SSC CGL
  • RRB NTPC
  • CTET
  • State PSC exams

Bangladesh

  • Medical admission test (MBBS)
  • BCS
  • University admission tests (DU, RU, JU)
  • NTRCA
  • Government job tests

How to prepare for Biology MCQs

  1. Draw quick labelled diagrams of the nephron, neuron and chloroplast, because many questions ask which part performs a specific function.
  2. Keep a list of scientists and their contributions, such as Chargaff, Lamarck and Darwin, since name-based questions repeat often.
  3. When a question says 'incorrect statement', read all four options carefully and eliminate the true ones before choosing.
  4. Revise plant and animal topics separately, then attempt mixed sets so you get used to switching between botany and zoology.

Frequently asked questions

What are the most important topics in Biology MCQs?

The most frequently tested topics are cell biology, genetics and DNA, human physiology including the nervous and excretory systems, photosynthesis and respiration, plant transport, and evolution. Medical entry tests also stress classification of kingdoms such as fungi, bryophytes and insects, so give those areas regular practice as well.

How many Biology MCQs are on MCQs360?

MCQs360 currently has 1,563 Biology MCQs in this category, each with its correct answer shown instantly. Practice is free and needs no sign-up, so you can work through the questions in short sessions and return whenever you want to revise a weak area again.

Which exams ask Biology MCQs?

Biology MCQs are central to MDCAT in Pakistan, NEET UG in India and the MBBS admission test in Bangladesh. They also appear in the everyday science sections of CSS, PMS, FPSC and PPSC papers, and in teaching recruitment tests where general science is part of the syllabus.

What is the difference between the symplast and apoplast pathways?

The symplast pathway moves water and solutes through the cytoplasm of cells, passing from cell to cell via plasmodesmata. The apoplast pathway moves water through cell walls and intercellular spaces. In roots, the Casparian strip in the endodermis blocks the apoplast route, forcing water to enter the symplast before reaching the xylem.

Last reviewed October 2026