MDCAT Biology MCQs Chapter Wise Practice
Master all 15 chapters of MDCAT Biology with our comprehensive question bank. Practice with detailed explanations and track your progress.
Why Biology Matters
Biology in MDCAT: The Highest Weightage Subject
Biology is the most critical subject in the MDCAT exam, carrying a massive weightage of 80 out of 200 marks, which translates to 40% of your total score. For aspiring medical and dental students in Pakistan, a strong command of Biology can be the decisive factor between securing admission to a top medical college or missing out. The PMC MDCAT Biology syllabus covers the entire FSc Pre-Medical Biology curriculum from both 11th and 12th grade, encompassing everything from cellular biology and molecular genetics to complex human physiology and ecological systems.
The Biology section of MDCAT tests not only your knowledge of facts and terminology but also your ability to apply biological concepts to solve problems. Questions often involve interpreting diagrams, analyzing experimental data, understanding cause-and-effect relationships in physiological processes, and making connections between different biological systems. This is why rote memorization alone is insufficient; you need deep conceptual understanding combined with extensive MCQ practice. Our collection of 15,000+ Biology MCQs covers every chapter, topic, and sub-topic in the PMC MDCAT 2026 syllabus. Each question is designed to mirror the actual exam pattern, helping you build the speed, accuracy, and confidence needed to score 70+ out of 80 in Biology. Whether you are starting your preparation or doing final revision, our chapter-wise MCQ bank with detailed explanations is the perfect resource to achieve your target score.
Chapter Breakdown
15 Chapters, 15,000+ MCQs
Complete chapter-wise Biology MCQ coverage aligned with the PMC MDCAT 2026 syllabus.
Cell Biology
Cell structure, organelles, membrane transport, cell theory
Biological Molecules
Carbohydrates, proteins, lipids, nucleic acids
Enzymes
Enzyme kinetics, inhibition, factors affecting enzyme activity
Cell Division
Mitosis, meiosis, cell cycle regulation
Genetics
Mendelian genetics, DNA replication, transcription, translation
Evolution
Natural selection, speciation, evidence for evolution
Animal Physiology
Digestion, respiration, circulation, excretion
Human Physiology
Nervous system, endocrine system, immune system
Plant Biology
Photosynthesis, transpiration, plant hormones, reproduction
Reproduction
Sexual and asexual reproduction, embryonic development
Biotechnology
Genetic engineering, PCR, cloning, applications
Ecology
Ecosystems, food chains, biogeochemical cycles, conservation
Diversity of Life
Classification, kingdoms, major phyla and divisions
Coordination & Control
Nervous coordination, hormonal control, homeostasis
Support & Movement
Skeletal system, muscular system, locomotion
Sample Questions
Test Your Biology Knowledge
Try these 10 sample MCQs from our Biology question bank. Click on an option to check your answer.
0 of 10 answered
The fluid mosaic model of cell membrane was proposed by:
In the sodium-potassium pump, for every cycle, the number of Na+ ions pumped out and K+ ions pumped in are:
Tay-Sachs disease is caused by malfunction of which organelle?
Which disaccharide is formed by glucose and galactose?
DNA replication is:
How many chromosomes are present in a normal human cell?
Which blood group is called the universal donor?
The cis face and trans face are associated with which organelle?
The largest organ of the human body is:
Which vitamin is essential for blood clotting?
Solved MCQs with Explanations
MDCAT Biology MCQs with Detailed Answers
Understanding the "why" behind each answer is crucial for MDCAT success. Here are sample MCQs with comprehensive explanations to help you build deep conceptual understanding.
Q1. The fluid mosaic model of cell membrane was proposed by:
- A) Robert Hooke
- B) Singer and Nicolson
- C) Schleiden and Schwann
- D) Lynn Margulis
Correct Answer: B) Singer and Nicolson
The fluid mosaic model was proposed by Singer and Nicolson in 1972. It describes the cell membrane as a fluid lipid bilayer with various proteins floating in it like a mosaic pattern. The lipids provide fluidity while the proteins perform various functions like transport and signaling.
Q2. In the sodium-potassium pump, for every cycle, the number of Na+ ions pumped out and K+ ions pumped in are:
- A) 2 Na+/3 K+
- B) 3 Na+/2 K+
- C) 3 Na+/3 K+
- D) 2 Na+/2 K+
Correct Answer: B) 3 Na+/2 K+
The Na+/K+ ATPase (sodium-potassium pump) is an active transport protein that pumps 3 Na+ ions out of the cell and 2 K+ ions into the cell per cycle, using one molecule of ATP. This creates an electrochemical gradient essential for nerve impulse transmission.
Q3. Tay-Sachs disease is caused by malfunction of which organelle?
- A) Peroxisomes
- B) Lysosomes
- C) Mitochondria
- D) Ribosomes
Correct Answer: B) Lysosomes
Tay-Sachs disease is a lysosomal storage disorder caused by a deficiency of the enzyme hexosaminidase A. Without this enzyme, GM2 ganglioside accumulates in nerve cells, leading to progressive neurological damage. This is a classic example of lysosomal malfunction.
Q4. Which disaccharide is formed by glucose and galactose?
- A) Sucrose
- B) Maltose
- C) Lactose
- D) Cellobiose
Correct Answer: C) Lactose
Lactose (milk sugar) is a disaccharide formed by the condensation of glucose and galactose through a β-1,4 glycosidic bond. Sucrose = glucose + fructose, Maltose = glucose + glucose, and Cellobiose = glucose + glucose (β-1,4 linkage).
Q5. The cis face and trans face are associated with which organelle?
- A) Endoplasmic reticulum
- B) Mitochondria
- C) Golgi apparatus
- D) Lysosomes
Correct Answer: C) Golgi apparatus
The Golgi apparatus has a cis face (receiving side, facing the ER) and a trans face (shipping side, facing the cell membrane). Proteins from the ER enter at the cis face, are modified as they pass through the Golgi cisternae, and exit at the trans face in vesicles for their final destination.
Want detailed explanations for all 15,000+ Biology MCQs? Download the PrepMDCAT app for complete access.
Complete Topic Coverage
MDCAT Biology Topics & Subtopics
Our Biology MCQ bank covers every topic and subtopic in the PMC MDCAT 2026 syllabus. All these topics are also covered in our comprehensive study notes available in the PrepMDCAT app.
Cell Biology
Biological Molecules
Genetics
Human Physiology
Plant Biology
Ecology
All notes for these topics are available in the PrepMDCAT app. Download now to access chapter-wise study notes, flashcards, and 15,000+ practice MCQs with detailed explanations.
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Download the PrepMDCAT app for complete chapter-wise Biology MCQs with detailed explanations, progress tracking, and AI-powered tutoring.
FAQs
Frequently Asked Questions
How many Biology MCQs are in the MDCAT exam?
The MDCAT exam contains 80 Biology MCQs out of 200 total questions, making Biology the highest-weighted subject at 40% of the total marks. This makes it the most important subject to prepare thoroughly.
Which Biology chapters have the highest weightage in MDCAT?
Human Physiology, Genetics, Coordination & Control, and Diversity of Life typically carry the highest weightage. Cell Biology and Biological Molecules are also frequently tested. Focus on these chapters for maximum score impact.
How should I prepare Biology MCQs for MDCAT 2026?
Start by reading your FSc Biology textbook thoroughly, then practice chapter-wise MCQs on PrepMDCAT. Focus on understanding concepts rather than memorization. Make flashcards for key terms, memorize diagrams, and take regular mock tests to track your progress.
Are MDCAT Biology MCQs based on FSc syllabus only?
Yes, MDCAT Biology questions are based on the FSc Pre-Medical syllabus (11th and 12th grade Biology) as prescribed by PMC. However, questions may test deeper conceptual understanding and application, so surface-level preparation is not enough.
How many Biology MCQs should I practice daily for MDCAT?
Aim to practice at least 50-100 Biology MCQs daily during your preparation phase. Start with chapter-wise MCQs to build a strong foundation, then move to mixed practice tests. Use PrepMDCAT's analytics to identify weak areas and focus your revision accordingly.
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