https://www.khanacademy.org/science/board-preparation-class-12-chemistry/x26282ebe5d9e53f9:week-3/x26282ebe5d9e53f9:biomolecules/e/biomolecules 2026-04-07T22:23:57.656416987Z Biomolecules This exercise tests your understanding of the concepts covered in the chapter "Biomolecules". Revathi exercise https://www.khanacademy.org/science/ap-biology/chemistry-of-life/properties-structure-and-function-of-biological-macromolecules/v/introduction-to-carbohydrates 2023-04-04T21:01:09.417661961Z Introduction to carbohydrates A carbohydrate is a type of molecule that contains carbon, hydrogen, and oxygen. Carbohydrates can be simple sugars (monosaccharides) like glucose, or they can be made up of multiple sugar units (polysaccharides) like glycogen. They are important in biology as a source of energy and as structural components in plants. video https://cdn.kastatic.org/googleusercontent/d4DSgNMDHgUbRMtEElZfALYamopcHnjOUDhjw7kBPF6_m96DuOVsamPlkdBfgp2vUXJWvBk9Fr0nYLp1SvThlSFD Introduction to carbohydrates A carbohydrate is a type of molecule that contains carbon, hydrogen, and oxygen. Carbohydrates can be simple sugars (monosaccharides) like glucose, or they can be made up of multiple sugar units (polysaccharides) like glycogen. They are important in biology as a source of energy and as structural components in plants. https://cdn.kastatic.org/ka-youtube-converted/6o4WL5jlpn0.mp4/6o4WL5jlpn0.mp4 268 Biomolecules https://www.khanacademy.org/science/hs-bio/x230b3ff252126bb6:energy-and-matter-in-biological-systems/x230b3ff252126bb6:biomolecules-and-reactions/v/introduction-to-proteins-and-amino-acids 2023-09-14T11:07:34.466749579Z Introduction to proteins and amino acids Proteins, large biomolecules or macromolecules, play a vital role in almost every biological process. They are made up of chains of amino acids, which are their building blocks. These chains, known as polypeptides, can form complex shapes, contributing to the diverse functions of proteins. Proteins can provide structure, facilitate muscle contraction, catalyze reactions as enzymes, and participate in immune response and signaling. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/7d140eef-7cac-45a0-9370-f705e69d9d10_1280_720_base.png Introduction to proteins and amino acids Proteins, large biomolecules or macromolecules, play a vital role in almost every biological process. They are made up of chains of amino acids, which are their building blocks. These chains, known as polypeptides, can form complex shapes, contributing to the diverse functions of proteins. Proteins can provide structure, facilitate muscle contraction, catalyze reactions as enzymes, and participate in immune response and signaling. https://cdn.kastatic.org/ka-youtube-converted/78QUeXVKiJ4.mp4/78QUeXVKiJ4.mp4 353 Biomolecules https://www.khanacademy.org/science/ap-biology/gene-expression-and-regulation/dna-and-rna-structure/v/introduction-to-nucleic-acids-and-nucleotides 2023-06-06T10:35:22.92767095Z Introduction to nucleic acids and nucleotides Nucleic acids, crucial macromolecules for life, were first discovered in cell nuclei and exhibit acidic properties. DNA and RNA, composed of nucleotide building blocks, store hereditary information. These polymers have a backbone of alternating ribose and phosphate groups, with nitrogenous bases forming ladder rungs. The sequence of nucleotides encodes genetic information, making nucleic acids fundamental to life. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/6074048f-6b8d-4794-b02a-7bb056d6dff4_1280_720_base.png Introduction to nucleic acids and nucleotides Nucleic acids, crucial macromolecules for life, were first discovered in cell nuclei and exhibit acidic properties. DNA and RNA, composed of nucleotide building blocks, store hereditary information. These polymers have a backbone of alternating ribose and phosphate groups, with nitrogenous bases forming ladder rungs. The sequence of nucleotides encodes genetic information, making nucleic acids fundamental to life. https://cdn.kastatic.org/ka-youtube-converted/hI4v7v8AdfI.mp4/hI4v7v8AdfI.mp4 355 Biomolecules https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-3/x04828215b460a495:the-age-of-adolescence/v/hormones-intro-working-control-coordination-biology-khan-academy 2020-09-09T11:53:30Z Hormones Intro & working Let's explore how hormones work and contrast it with the nervous system. Mahesh Shenoy video https://cdn.kastatic.org/googleusercontent/pN3wcXoCV8sjj1M7S7Qo4SiJdMY2l3bVXhkhTujbo899h2wyPVH7XPlmE35ivUB6V-PHEWkTrwqIRFVp3GwGGNS7 Hormones Intro & working Let's explore how hormones work and contrast it with the nervous system. https://cdn.kastatic.org/ka-youtube-converted/gaN0ceyrpqQ.mp4/gaN0ceyrpqQ.mp4 598 Biomolecules