The Whole of OCR-A-Level Biology | Exam revision for papers 1, 2 and 3

I want to help you achieve the grades you (and I) know you are capable of; these grades are the stepping stone to your future. Even if you don't want to study science or maths further, the grades you get now will open doors in the future. Tutoring - We can match you with an experienced tutor to help increase your confidence and fill in any gaps in your knowledge https://www.primrosekitten.com/pages/... 2025 predicted Exam Papers for GCSE and A-Level Biology, Chemistry, Physics, and Maths Revision Essential! https://www.primrosekitten.com/collec... FREE Revision Guides when you sign up for the mailing list plus discount codes and updates https://primrose-kitten.beehiiv.com/ 2025 predicted Exam Paper Walkthroughs Playlist    • Predicted Exam Paper Walkthroughs | 2025 E...   These are full walkthroughs of all the predicted papers that have been written for 2023 -full papers -what is the question REALLY asking -hints and tips from examiners -the background behind the question -how to structure your answer to get the most marks -what the mark schemes really mean 00:00:00 Start 00:01:15 Module 2 - Foundations in Biology 00:02:10 Cell structure 00:10:31 Very small units 00:13:29 Types of microscopes 00:21:09 Magnification Calculations 00:22:25 Biological drawings 00:23:14 Bonding in biological molecules 00:23:41 Water 00:27:43 Inorganic ions 00:29:04 Biological molecules 00:29:05 Monomers and Polymers 00:30:09 Hydrolysis and condensation reactions 00:32:03 Monosaccharides 00:37:41 α-glucose and starch 00:40:06 Tests for reducing sugars and non-reducing sugars 00:43:23 Lipids 00:50:09 The role of proteins 00:57:37 PAG 6 Identification of the amino acids in a protein using paper chromatography 01:01:49 Nucleotides 01:14:59 Enzymes 01:37:09 Cell membranes 01:43:10 Osmosis 01:48:58 Transport 01:53:59 The cell cycle 01:55:12 Mitosis 02:02:52 Meiosis 02:06:55 Cells of multicellular organisms are specialised for particular functions 02:15:13 Tissues, organs and organ systems 02:21:53 Uses of stem cells in research and medicine 02:23:57 Module 3 - Exchange and transport 02:24:54 Surface area to volume ratio and size 02:29:46 Gas exchange in Humans 02:42:39 Different types of circulatory systems 02:44:36 Circulation of blood 02:46:51 Blood vessels + tissue fluid 02:48:44 Formation of tissue fluid from plasma 02:49:58 Dissection of animal or plant respiratory system or mass transport system 02:51:51 Cardiac cycle 02:55:23 Use and interpretation of electrocardiogram (ECG) traces 02:57:01 Role of haemoglobin in transporting oxygen and carbon dioxide 02:58:51 Oxygen dissociation curve for fetal and adult human haemoglobin 03:07:44 Gas exchange in plants 03:17:51 Module 4 - Biodiversity, evolution and disease 03:18:47 Pathogens 03:25:02 Antigens 03:26:25 Phagocytosis 03:27:28 T lymphocytes 03:28:45 B lymphocytes 03:30:04 Antibodies 03:33:11 Vaccines and immunity 03:40:36 Ecosystems, populations and communities 03:42:11 Species diversity 03:43:28 Biodiversity 04:00:11 Types of conservation 04:06:17 Classification and taxonomy 04:15:20 Intraspecific and interspecific variation 04:17:24 Natural selection 04:26:03 Module 5 - Communication, Homeostasis and Energy 04:27:08 Homeostasis and temperature control 04:37:56 Excretion and liver function 04:41:34 The kidneys 05:04:44 Sensory receptors 05:15:54 Generator potential 05:21:31 An action potential 05:27:03 Synapse 05:34:29 Structure and function of the adrenal glands 05:44:09 Causes of types I and II diabetes 05:50:31 Plant responses 06:05:52 Effects and Commercial uses of plant hormones 06:12:53 Structure and function of nervous system and human brain 06:42:46 Electrical Activity PAG 06:44:25 Chloroplast Structure and Adaptations 06:47:24 Photosystems and pigments 06:50:29 Photosynthesis 07:04:28 Aerobic respiration 07:21:07 Anaerobic respiration 07:29:22 Module 6 - Genetics, Evolution and Ecosystems 07:30:34 Gene mutations 07:40:00 Transcription factors 07:50:41 Monohybrid Inheritance 07:56:48 Codominant alleles 08:01:51 Dihybrid crosses 08:14:05 Sex linkage 08:19:50 The Hardy-Weinberg principle 08:28:20 Variation and Natural Selection 08:32:23 Stabilizing, directional and disruptive selection 09:00:06 PCR 09:08:22 Genetic fingerprinting 09:20:02 DNA probes 09:40:34 Gene therapy 09:49:22 Natural and artificial cloning 09:59:32 Uses of microorganisms in biotechnology 10:04:53 Culturing Microorganisms and PAGS 10:12:04 Immobilised enzymes in biotechnology 10:13:54 Food chains and food webs 10:18:32 Biomass 10:29:11 The nitrogen cycle 10:38:09 Carbon cycle 10:40:14 Succession 10:55:07 Abiotic and biotic factors and populations 11:30:39 Managing Ecosystems 11:35:56 Ecosystems and Human impact