A Level Biology - Biological Molecules 2.2

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Last updated: December 14, 2017
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First submittedDecember 14, 2017
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Definition
Keyword
Reaction that occurs when two molecules are joined together with the removal of water
Condensation
A weak interaction that can occur wherever molecules contain a slightly negatively charged atom bonded to a slightly positively charged hydrogen atom
Hydrogen bond
Reaction that occurs when a molecule is split into two smaller molecules with the addition of water
Hydrolysis
A small molecule which binds to many other identical molecules to form a polymer
Monomer
A large molecule made from many smaller molecules called monomers
Polymer
A group of molecules containing C, H and O
Carbohydrates
A bond formed between two monosaccharides by a hydrolysis reaction
Glycosidic bond
A group of substances that are soluble in alcohol rather than water. They include triglycerides, phospholipids, glycolipids and cholesterol
Lipids
A very large, organic molecule
Macromolecule
Molecule consisting of glycerol, two fatty acids and one phosphate group
Phospholipid
Definition
Keyword
Monomers of all proteins, and all amino acids have the same basic structure
Amino acids
A bond formed when two amino acids are joined by a condensation reaction
Peptide bond
The sequence of amino acids found in a molecule
Primary structure
The coiling or folding of an amino acid chain, which arises often as a result of hydrogen bond formation between different parts of the chain. For example, alpha helixes and beta pleated sheet
Secondary structure
The overall three-dimensional shape of a protein molecule. Its shape arises due to interactions including hydrogen bonding, disulfide bridges, ionic bonds and hydrophobic interactions
Tertiary structure
Protein structure where protein consists of more than one polypeptide chain. For example, insulin
Quarternary structure
Has a relatively long, thin structure, is insoluble in water and metabolically inactive, often having a structural role within an organism
Fibrous protein
Has molecules of a relatively spherical shape, which are soluble in water, and often have metabolic roles within the organism
Globular protein
A non-protein component that forms a permanent part of a functioning protein molecule
Prosthetic group
1 Comments
+1
Level 71
Jul 11, 2023
"Quarternary structure" is incorrect. "Quaternary structure" is correct.