OCR A Level Biology:复习笔记2.2.14 Inorganic Ions
Inorganic Ions An ion is an atom (or sometimes a group of atoms) that has an electrical charge An ion that has a +ve charge is known as a cation An ion that has a -ve charge is known as an anion &n...
OCR A Level Biology:复习笔记2.2.13 Fibrous Proteins
Fibrous Proteins Fibrous proteins are long strands of polypeptide chains that have cross-linkages due to hydrogen bonds These proteins have little or no tertiary structure Due to a large number of ...
OCR A Level Biology:复习笔记2.2.12 Globular Proteins
Globular Proteins Globular Globular proteins are compact, roughly spherical (circular) in shape and soluble in water Globular proteins form a spherical shape when folding into their tertiary struct...
OCR A Level Biology:复习笔记2.2.11 Protein: Structure
Levels of Protein Structure There are four levels of structure in proteins, three are related to a single polypeptide chain and the fourth level relates to a protein that has two or more polypeptid...
OCR A Level Biology:复习笔记2.2.10 Amino Acids & Peptide Bonds
Amino Acids Proteins Proteins are polypeptides (and macromolecules) made up of monomers called amino acids The sequence, type and number of the amino acids within a protein determines its shape and...
OCR A Level Biology:复习笔记2.2.9 Biochemical Tests: Lipids
Biochemical Tests: Lipids The emulsion test can be carried out quickly and easily in a lab to determine if a sample contains lipids Lipids are nonpolar molecules that do not dissolve in water but w...
CIE IGCSE Biology: 复习笔记：4.1.1 Chemicals & Life
CIE IGCSE Biology: 复习笔记：4.1.1 Chemicals & Life Chemical Elements Most of the molecules in living organisms fall into three categories: carbohydrates, proteins and lipids These all contain ...
OCR A Level Biology:复习笔记2.2.8 Lipids: Structure & Function
Lipids: Structure & Function Triglycerides Triglycerides are fats and oils Fatty acid and glycerol molecules are the components that make up triglycerides Fats and oils have a number of importa...
CIE IGCSE Biology: 复习笔记：3.1.8 Proteins & Active Transport
CIE IGCSE Biology: 复习笔记：3.1.8 Proteins & Active Transport Importance of Active Transport: Extended Energy is needed because particles are being moved against a concentration gradient, in t...
