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Description
Flashcards by Nazmin Shafiq, updated more than 1 year ago
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Created by Nazmin Shafiq
about 8 years ago
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| Question | Answer |
| What is a Monomer? Examples? | Small, basic molecular units E.g. Monosaccharides, Amino acids and Nucleotides |
| What are Polymers? Examples? | Large, complex molecules composed of long chains of monomers joined together E.g. Carbohydrates, Lipids, Proteins and Nucleic acids |
| Structure of Alpha and Beta Glucose -Hexose Sugar (C6H12O6) | ISOMERS - same molecular formula, different arrangement of atoms |
| Examples of Monosaccharides | E.g. Glucose, Fructose, Galactose |
| A Condensation Reaction is... | a chemical reaction in which two molecules join together with a formation of a new chemical bond and a water molecule is released |
| A Hydrolysis Reaction is... | a chemical reaction in which a chemical bond is broken between two molecules using a water molecule |
| Condensation & Hydrolysis Reaction in Maltose | |
| What is a Disaccharide? Examples? | Two monosaccharides joined by a glycosidic bond Maltose = Glucose + Glucose Sucrose = Glucose + Fructose Lactose = Glucose + Galactose |
| Descibe the Benedict's test for Reducing Sugars | 1) Add Benedict's reagent to sample 2) Heat in water bath (100°C) 3) Forms coloured precipitate if test is positive -Higher the concentration, the further the colour change |
| Describe the Benedict's test for Non-Reducing Sugars | 1) Add dilute hydrochloric acid to new sample and heat in water bath (100°C) 2) Neutralise using sodium hydrogencarbonate 3) Carry out Benedicts test POSITIVE = Contain non-reducing sugar NEGATIVE = No sugars present |
| What is a polysaccharide? Examples? | 2+ Monosaccharides joined by a Condensation Reaction E.g. Starch, Glycogen and Cellulose |
| What is Starch? | A polysaccharide found in many plants -Important component of food -Main energy storage material |
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