AQA A Level Biology復(fù)習(xí)筆記1.4.3 How Enzymes Work
How Enzymes Work The lock-and-key hypothesis Enzymes are?globular proteins This means their?shape?(as well as the shape of the?active site?of an enzyme) is determined by the complex tertiary...
AQA A Level Biology復(fù)習(xí)筆記1.4.2 Enzyme Specificity
Mode of Enzyme Action Enzymes have an?active site?where?specific substrates bind?forming an?enzyme-substrate complex The?active site?of an enzyme has a?specific shape?to fit a specific subst...
AQA A Level Biology復(fù)習(xí)筆記1.3.8 The Molecular Structure of Collagen
The Molecular Structure of Collagen Collagen?is the most common?structural?protein found in vertebrates In vertebrates it is the component of?connective tissue?which forms: Tendons Cartilage...
AQA A Level Biology復(fù)習(xí)筆記1.3.7 The Molecular Structure of Haemoglobin
The Molecular Structure of Haemoglobin Structure Haemoglobin is a?globular?protein which is an oxygen-carrying pigment found in vast quantities in red blood cells It has a?quaternary?structu...
AQA A Level Biology復(fù)習(xí)筆記1.3.6 Globular & Fibrous Proteins
Proteins: Globular & Fibrous Globular Globular proteins?are?compact, roughly?spherical?(circular) in shape and?soluble?in water Globular proteins form a spherical shape when folding into...
AQA A Level Biology復(fù)習(xí)筆記1.3.5 Biochemical Tests: Proteins
Biochemical Tests: Proteins The biuret test for proteins A liquid solution of a sample is treated with sodium or potassium hydroxide to make the solution alkaline A few drops of copper (II) ...
AQA A Level Biology復(fù)習(xí)筆記1.3.4 Protein Interactions
Proteins: Interactions & Shape A polypeptide chain will fold differently due to the interactions (and hence the bonds that form) between?R groups. The three-dimensional configuration that forms...
AQA A Level Biology復(fù)習(xí)筆記1.3.3 Protein Structure & Function
Proteins: Structures & Functions 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...
AQA A Level Biology復(fù)習(xí)筆記1.3.2 Chromatography: Amino Acids
Chromatography: Amino Acids Chromatography is a technique that can be used to?separate a mixture?into its individual components Chromatography relies on?differences in the solubility?of the ...
AQA A Level Biology復(fù)習(xí)筆記1.2.5 Lipid Diagrams & Properties
Lipid Diagrams & Properties Triglycerides are a form of lipid They are made up of one molecule of glycerol with three?fatty acids?attached to it These fatty acids have?long hydrocarbon ‘...
AQA A Level Biology復(fù)習(xí)筆記1.2.4 Biochemical Tests: Lipids
Biochemical Tests: Lipids The emulsion test that can be carried out quickly and easily in a lab to determine if a sample contains lipids This test is?qualitative?- it does not give a?quantit...
AQA A Level Biology復(fù)習(xí)筆記1.2.3 Phospholipids
The Vital Role of Phospholipids Structure Phospholipids are a type of lipid, therefore they are formed from the monomer glycerol and fatty acids Unlike triglycerides, there are only?two fatt...
