https://www.khanacademy.org/science/ap-biology/cellular-energetics/enzyme-structure-and-catalysis/v/enzymes 2023-09-14T11:07:34.466749579Z Enzymes Enzymes are biological catalysts that speed up reactions. The active site is where substrates bind to the enzyme. Induced fit occurs when the enzyme changes shape to better accommodate substrates, facilitating the reaction. Enzymes can be used multiple times and are affected by factors such as temperature and pH. Sal Khan video https://cdn.kastatic.org/googleusercontent/h1dV6OeMNiX3N5HDBw9YZKd79xRqmVdRZHClIn18HKP4GjuAMFgBr-uWhH4d1zXo3H-poNJVHHxAgcP_LtgyfYWB Enzymes Enzymes are biological catalysts that speed up reactions. The active site is where substrates bind to the enzyme. Induced fit occurs when the enzyme changes shape to better accommodate substrates, facilitating the reaction. Enzymes can be used multiple times and are affected by factors such as temperature and pH. https://cdn.kastatic.org/ka-youtube-converted/A90HKrgUOg0.mp4/A90HKrgUOg0.mp4 493 Enzymes (biocatalysts and their regulation) https://www.khanacademy.org/science/ap-biology/cellular-energetics/environmental-impacts-on-enzyme-function/v/competitive-inhibition 2023-04-04T21:01:09.417661961Z Competitive inhibition Enzymes catalyze reactions by binding substrates to their active sites. Inhibition can occur competitively (when a molecule competes for the active site) or non-competitively (when a molecule binds somewhere else on the enzyme, altering the enzyme's shape). Allosteric regulation describes any case where an enzyme’s function at one site is affected by the binding of a molecule at another site. video https://cdn.kastatic.org/googleusercontent/DQVw_g5B0n_X2O5GN5UuUIlhwq7Nef1D8fNuBfgsLvw9YRB3F0CTsiVqSnAr8LHQ13fjPzzQbq2e6Fnk0cP4Dll5 Competitive inhibition Enzymes catalyze reactions by binding substrates to their active sites. Inhibition can occur competitively (when a molecule competes for the active site) or non-competitively (when a molecule binds somewhere else on the enzyme, altering the enzyme's shape). Allosteric regulation describes any case where an enzyme’s function at one site is affected by the binding of a molecule at another site. https://cdn.kastatic.org/ka-youtube-converted/O23i38B2EmA.mp4/O23i38B2EmA.mp4 390 Enzymes (biocatalysts and their regulation) https://www.khanacademy.org/science/ap-biology/cellular-energetics/environmental-impacts-on-enzyme-function/v/noncompetitive-inhibition 2021-06-20T23:42:40Z Noncompetitive inhibition Seeing how a noncompetitive inhibitor can bind whether or not the substrate is bound, and vice versa. video https://cdn.kastatic.org/googleusercontent/XWelpqxDYVqXrio3RKN1dAVNIiiFH0XLxUwgghbNvpwP1_M9z8bxQMNGsz3nJ6x6yaf1MgVrM0fK0S37B7Ros3cfaA Noncompetitive inhibition Seeing how a noncompetitive inhibitor can bind whether or not the substrate is bound, and vice versa. https://cdn.kastatic.org/ka-youtube-converted/4xOsAuj0QZg.mp4/4xOsAuj0QZg.mp4 295 Enzymes (biocatalysts and their regulation) https://www.khanacademy.org/science/ap-biology/cellular-energetics/environmental-impacts-on-enzyme-function/a/hs-enzymes-review 2021-04-29T07:56:24Z Enzymes review article https://www.khanacademy.org/science/jnv-biology-grade-11-revision-course-full-term/x3ed1e7eacb19007a:week-2/x3ed1e7eacb19007a:untitled-530/e/enzymes-class-11-biology 2026-04-08T00:16:02.937952483Z Enzymes Practice questions on how enzymes work. Moumita Sen exercise https://www.khanacademy.org/science/grade-11-biology-snc-aligned/x58c107ba92d3f0b2:domain-f-metabolism/x58c107ba92d3f0b2:classification-of-enzymes/a/more-enzyme-classes-and-mechanisms-of-catalysis 2024-09-10T20:06:36.025706854Z More enzyme types and mechanisms of catalysis This article provides an overview of different classes of enzymes, as well as the mechanisms used by enzymes to lower activation energy and speed up a reaction. article https://www.khanacademy.org/science/ap-biology/cellular-energetics/environmental-impacts-on-enzyme-function/a/basics-of-enzyme-kinetics-graphs 2021-04-29T07:53:34Z Basics of enzyme kinetics graphs How to read enzyme kinetics graphs (and how they're made). Km and Vmax. Competitive and noncompetitive inhibitors. article https://www.khanacademy.org/science/ap-biology/cellular-energetics/environmental-impacts-on-enzyme-function/a/enzyme-regulation 2021-04-29T08:03:49Z Enzyme regulation Cofactors and coenzymes. Reversible, irreversible, competitive, and noncompetitive inhibitors. Allosteric enzymes. Feedback inhibition. article https://www.khanacademy.org/science/ap-biology/cellular-energetics/enzyme-structure-and-catalysis/a/enzymes-and-the-active-site 2026-03-17T04:30:40.156944414Z Enzymes and the active site Enzymes as biological catalysts, activation energy, the active site, and environmental effects on enzyme activity. article https://www.khanacademy.org/science/ap-biology/cellular-energetics/enzyme-structure-and-catalysis/e/enzyme-structure-and-catalysis-exercise 2026-04-02T04:15:35.616513959Z Enzyme structure and catalysis Test your knowledge of enzyme structure and catalysis! Lauren Rosebrugh exercise https://www.khanacademy.org/science/grade-12-chemistry-snc-aligned/x7a43e770fc9e15cf:biochemistry/x7a43e770fc9e15cf:enzymes-biocatalysts-and-their-regulation/e/enzymes-questions 2021-06-05T02:09:01Z Enzymes questions Questions pertaining to enzymes John Luckoski exercise