IMAT Biology
Biology preparation works best when facts form a model you can use. Connect the structure of a cell to transport and metabolism, then connect molecular processes to inheritance and whole-body physiology. Practise predicting what changes when one part of a system changes.
By MEDichondria · Updated · About our content
Topic map
These topics follow MEDichondria's mapped curriculum. Check the annual MUR syllabus for the binding content scope of your admission cycle.
See Biology in the complete syllabus. Physics and Mathematics are separate study tracks here; the 2026 decree grouped their exam questions together.
Study sequence
Step 1
Start with water, biological molecules, enzymes, membranes, and organelles. Draw a cell from memory and explain how each structure supports a function. Distinguish diffusion, osmosis, and active transport.
Step 2
Compare mitosis and meiosis, then follow DNA replication, transcription, and translation. Solve simple inheritance crosses before adding pedigrees and probability. Explain genotype and phenotype separately.
Step 3
Link respiration and photosynthesis to energy transfer. Study organ systems using inputs, outputs, and feedback. Return to evolution and biotechnology once the underlying cell and genetics models are secure.
Subject focus
Use this cell biology breakdown to explain what a structure does, where a process happens and what changes when conditions change. These are study priorities within the mapped syllabus, not a forecast of how frequently topics will appear.
Compare prokaryotic and eukaryotic cells, then connect the nucleus, ribosomes, endoplasmic reticulum, Golgi apparatus and mitochondria to their jobs. Ribosomes build proteins; they do not generate the ATP used by cellular processes. Distinguish a cell's plasma membrane from the membranes around its organelles.
For the usual secretory pathway, follow a protein from ribosomes associated with rough endoplasmic reticulum into the ER, through transport vesicles to the Golgi, and into secretory vesicles that fuse with the plasma membrane. The Golgi modifies and sorts cargo; it does not translate the protein. Proteins that remain in the cytosol need not follow this pathway.
Identify the substance, its concentration gradient, the membrane's permeability and any energy input. Simple diffusion and facilitated diffusion move a substance down its gradient; facilitated diffusion uses a membrane protein. Active transport can move a substance against its gradient using an energy source. For osmosis, track water movement and state the pressure conditions rather than treating all solutes as membrane-permeable.
Use G1, S, G2 and mitosis as a timeline. DNA is replicated in S phase: by G2 the DNA quantity has doubled, while joined sister chromatids are still counted as one chromosome. When sisters separate, count chromosomes in the stated cell or daughter cell at the stated stage. Do not apply the halving associated with meiosis to an ordinary mitotic daughter cell.
Supporting references, reviewed 15 October 2026: OpenStax: the endomembrane system and proteins · OpenStax: the cell cycle. These explain concepts; the official annual syllabus defines exam scope.
Common mistakes
Original practice
These introductory IMAT-style teaching examples are written for this guide. They are not official past-paper questions or a prediction of the next exam. Choose an answer and state your reasoning before opening the solution.
Example 1 · Genetics
Answer B: 1/2
Each parent contributes A or a with probability 1/2. The four equally likely combinations are AA, Aa, aA, and aa.
Two of the four combinations are heterozygous, so the probability is 2/4 = 1/2. A dominant phenotype and a heterozygous genotype are different questions.
Example 2 · Cell transport
Answer C: Into the cell
Under these conditions, water moves by osmosis towards the solution with the greater solute concentration, so the initial net movement is into the cell.
Osmosis does not require ATP. The word initial matters: concentration differences and pressure can change as water moves.
Example 3 · Protein trafficking
Answer B: Rough ER → Golgi → secretory vesicle → plasma membrane
A protein entering the secretory pathway is made by a ribosome associated with rough ER and enters the ER. Transport vesicles carry it to the Golgi for further processing and sorting.
A secretory vesicle then fuses with the plasma membrane to release its contents by exocytosis. Animal cells have no cell wall, and the Golgi is not a site of translation.
Example 4 · DNA quantity
Answer D: 6 chromosomes and 8 pg DNA
S phase copies the DNA: 4 pg × 2 = 8 pg. Each chromosome now has two joined sister chromatids, so the chromosome count remains six at this stage.
Doubling DNA quantity is different from doubling chromosome number. The question is about one cell after replication, before sister chromatids separate; it is not asking about a meiotic product.
Learn how to review mistakes and progress to timed IMAT sets.
For further background study: OpenStax Biology 2e. This textbook is a supporting resource, not the official IMAT syllabus.
Subject questions
First identify the main structures and explain their functions. Then trace a process such as protein secretion or membrane transport through those structures. Finish with questions that change one condition and require you to predict the consequence. Use the applicable official syllabus to set your study boundary.
After S phase, DNA quantity has doubled but the joined sister chromatids are still counted as one chromosome before they separate. Always specify the stage and whether you are counting within one dividing cell or within a daughter cell.
No. They are original MEDichondria teaching examples with explained answers. Use official past papers separately to review published exam questions, and check the annual decree before treating any practice set as a full simulation.
Subject guides
Use these public guides to plan your study order, identify common mistakes, and practise with original questions and explained answers before opening the full workspace.
MEDichondria workspace
Use the full workspace for focused lessons, configurable timed question sets, and saved review progress.
