Topic 1 - Biological molecules Flashcards
Adenosine triphosphate (ATP)
A molecule that acts as the energy currency of cells formed from a molecule of ribose, a molecule of adenine and three phosphate groups.
Amino acid
The monomers containing an amino group (NH2), a carboxyl group (COOH) and a variable R group that make up proteins.
Benedict’s test
A biochemical test used to test for reducing sugars that produces a different colour based on the amount of reducing sugar present.
Biuret test
A biochemical test that produces a purple solution in the presence of protein
Cellulose
A polysaccharide made of beta glucose monomers that is used as a structural polysaccharide which provides strength to plant cell walls.
Condensation reaction
A type of reaction that joins two molecules together with the formation of a chemical bond involving the elimination of a molecule of water.
Deoxyribonucleic acid (DNA)
An information storing molecule made up of
deoxyribonucleotide monomers joined by phosphodiester bonds to form a double helix.
Dipeptide
Molecules formed by the condensation of two amino acids.
Disaccharide
Molecules formed by the condensation of two monosaccharides
DNA helicase
An enzyme that breaks the hydrogen bonds between the two DNA strands in the DNA molecule that is going to be replicated.
DNA polymerase
An enzyme that catalyses the condensation reactions between the new nucleotides in the synthesis of the new DNA strand
Enzyme
A protein molecule that acts as a biological catalyst and increases the rate of biochemical reactions.
Glycogen
A highly branched polysaccharide made of alpha glucose monomers that is used as the main storage of energy in humans and animals
Glycosidic bond
A bond between two monosaccharides formed in a condensation reaction.
Heat capacity
The amount of energy needed to raise the temperature of a substance by a specific amount.