The Whole of AQA A-Level Biology | Exam Revision for Papers 1, 2 and 3

This video concisely and with detail covers the content for the AQA A-Level Biology exams 2025 predicted Exam Papers for GCSE and A-Level Biology, Chemistry, Physics, and Maths Revision Essential! https://www.primrosekitten.com/collections/predicted-papers FREE Revision Guides when you sign up for the mailing list plus discount codes and updates https://primrose-kitten.beehiiv.com/ Join this channel to get access to the perks: https://www.youtube.com/channel/UCBgvmal8AR4QIK2e0EfJwaA/join 00:00:00 Start 00:01:42 Topic 1 - Biological Molecules 00:02:22 Bonding in biological molecules 00:03:51 Monomers and Polymers 00:06:47 Carbohydrates 00:16:51 Lipids 00:21:09 Proteins 00:24:36 Biuret test for proteins 00:25:09 Protein structures 00:30:02 Enzymes 00:45:23 Nucleotides 00:46:59 RNA 00:48:04 DNA replication 00:49:32 Adenosine triphosphate – ATP 00:51:35 Water 00:54:36 Inorganic ions 00:56:11 Topic 2 - Cells 01:06:46 Structure of viruses 01:08:21 Very small units 01:11:21 Types of microscopes 01:20:21 Separating cell components 01:22:01 The cell cycle 01:27:05 Required Practical 2 - Preparation of stained squashes of cells from plant root tips 01:29:08 Cancer 01:30:21 Binary fission in prokaryotic cells 01:31:13 Virus replication 01:32:07 Cell recognition and the immune system 01:36:07 Required Practical 3 - Production of a dilution series of a solute to produce a calibration curve with which to identify the water potential of plant tissue 01:37:27 Osmosis 01:41:21 Required Practical 4 - Investigation into the effect of a named variable on the permeability of cell-surface membranes 01:42:20 Diffusion 01:50:47 Antigens 01:52:11 Phagocytosis 01:53:14 Lymphocytes 01:55:50 Antibodies 01:57:28 Vaccines and immunity 02:00:42 HIV and AIDS 02:02:40 Monoclonal antibodies and ELISA tests 02:05:46 Topic 3 - Organisms exchange substances with their environment 02:06:35 Surface area to volume ratio 02:11:26 Gas exchange 02:23:51 Digestion 02:34:19 Required practical 5 - Dissection of animal or plant respiratory system or mass transport system 02:36:05 Mass transport 03:00:00 Topic 4 - Genetic information, variation and relationships between organisms 03:00:50 DNA, genes and chromosomes 03:14:57 Natural selection 03:16:03 Genetic diversity 03:17:28 Directional and stabilizing selection 03:20:39 Antibiotic resistance 03:23:07 Required Practical 6 - Use of aseptic techniques to investigate the effect of anti-microbial substances on microbial growth (Part 1) 03:24:39 Required Practical 6 - Use of aseptic techniques to investigate the effect of anti-microbial substances on microbial growth (Part 2) 03:25:33 Species and taxonomy 03:32:33 Biodiversity within a community 03:40:50 Investigating diversity 03:47:30 Topic 5 - Energy Transfers in and between organisms (A-Level only) 03:48:13 Required Practical 7 - Use of chromatography to investigate the pigments isolated from leaves of different plants 03:53:09 Chloroplast Structure and Adaptations 03:56:08 Photosystems and pigments 03:59:13 Photosynthesis 04:07:21 Required Practical 8 - Investigation into the effect of a named factor on the rate of dehydrogenase activity in extracts of chloroplasts 04:16:12 Respiration 04:32:40 Required Practical 9 - Investigation into the effect of a named variable on the rate of respiration of cultures of single-celled organisms 04:36:22 Energy transfers in ecosystems 04:50:27 The nutrient cycle 05:06:35 Topic 6 - Organisms respond to changes in their internal and external environments (A-Level only) 05:07:35 Stimuli, both internal and external lead to a response 05:27:47 Required Practical 10 - Investigation into the effect of an environmental variable on the movement of an animal using either a choice chamber or a maze 05:49:10 Control of heart rate 05:52:38 Chemoreceptors and pressure receptors 05:53:28 Nervous coordination and skeletal muscles 06:29:13 Homeostasis 06:56:04 Required Practical 11 - Production of a dilution series of a glucose solution 06:59:42 Osmoregulation 07:10:52 Topic 7 - Genetics, populations, evolution and ecosystems (A-Level only) 07:12:08 Inheritance 07:41:16 The Hardy-Weinberg principle 07:49:46 Variation and Natural Selection 08:05:06 Ecosystems, populations and communities 08:18:27 Population sampling - Required Practical 08:33:07 Population estimation by mark-release-recapture 08:37:14 Succession 08:52:04 Conservation of habitats 09:01:26 Topic 8 - The control of gene expression (A-Level only) 09:02:57 Gene mutations 09:12:20 Stem cells 09:24:16 Transcriptional factors and gene expression 09:31:36 RNAi 09:35:08 Epigenetics 09:50:26 Gene Expression and Cancer 10:09:56 Genomes 10:18:02 Recombinant DNA 10:39:28 PCR 10:52:03 Genetic screening 10:54:01 Genetic fingerprinting