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Learn why glucose dissolves in water while starch is relatively insoluble, using hydrogen bonding, molecular size and structure for IB Biology exams.
Read the answerLearn how hydrolysis uses water to break biological polymers into monomers, with IB Biology examples involving carbohydrates, proteins and lipids.
Learn how β-glucose forms straight cellulose chains, hydrogen-bonded microfibrils, and strong plant cell walls that resist turgor pressure in IB Biology.
Compare starch, glycogen, and cellulose by glucose form, bonding, branching, properties, and biological function for precise IB Biology exam answers.
Learn why lipids are hydrophobic, how non-polar hydrocarbon regions interact with polar water, and how this explains membranes and energy storage.
Learn how membrane glycoproteins act as cell-recognition markers and how ABO antigens determine blood groups and transfusion compatibility in IB Biology.
Learn how saturated, monounsaturated, and polyunsaturated fatty acids differ in double bonds, shape, melting point, and biological function.
Learn how glycerol and three fatty acids form a triglyceride through condensation reactions, including ester bonds and water release for IB Biology.
Learn what amphipathic means in IB Biology and how the hydrophilic and hydrophobic regions of phospholipids cause membrane bilayers to form.
Learn why animals use triglycerides for long-term energy storage, how fat compares with glycogen, and the key points needed for IB Biology at SL and HL.
Learn how amino acids undergo condensation to form peptide bonds and polypeptides, using precise IB Biology terminology and exam-focused guidance for success.
Learn why non-polar steroid hormones cross phospholipid bilayers by simple diffusion and how to explain the mechanism clearly in IB Biology exams.
Learn the generalized amino acid structure, including the alpha carbon, amino group, carboxyl group, hydrogen and variable R group for IB Biology exams.
Learn how essential and non-essential amino acids differ, why both are needed for protein synthesis, and how to explain them in IB Biology exams.
Learn how temperature and pH denature proteins by altering their shape and function, and how to explain the process in IB Biology exams at SL and HL.
Learn why proteins have virtually infinite variety through differences in amino acid sequence, chain length and folding, with IB Biology exam guidance.
Learn how amino acid R-groups determine protein folding, bonding and function for IB Biology AHL topic B1.2 Proteins, with exam-focused guidance.
Learn how primary, secondary, tertiary and quaternary protein structures differ, including their bonds, interactions and IB Biology examples.
Compare globular and fibrous proteins for IB Biology AHL, including shape, solubility, function, and the key examples insulin and collagen.
Learn how hydrogen bonds, ionic bonds, disulfide bonds and hydrophobic interactions stabilize tertiary protein structure for IB Biology AHL exams.
Learn why insulin is a compact, soluble globular protein while collagen is a long, strong fibrous protein, with AHL formtofunction exam links for IB Biology.
Learn how the fluid mosaic model explains membrane structure, phospholipid movement, proteins, cholesterol and selective permeability in IB Biology.
Compare simple diffusion, facilitated diffusion, and active transport by direction, membrane route, energy use, specificity, and IB exam examples.
Learn how osmosis moves water across selectively permeable membranes and how aquaporins accelerate water transport in cells for IB Biology exams.
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