Welcome to your CIE AS Biological molecules Which of the following solutions turn milky white upon adding ethanol and water? a) A slice of potato b) Milk c) Palm oil d) A piece of apple a & b only None a, b & c b & c onlyWhich of the following does not react with Benedict's solution? Fructose Glucose Maltose SucroseWhat happens when a Biuret reagent is added to a solution of free amino acids? The solution turns brick red. The solution turns mauve/purple. The solution turns milky white. The solution remains blue.Which property of water makes it possible for a pond skater to 'walk' on the surface of a water body? Density and freezing properties High specific heat capacity High surface tension High latent heat of vapourisationSelect the incorrect statement regarding the haemoglobin molecule. The haem group is responsible for the colour of haemoglobin. One oxygen molecule,O2, can bind with each iron atom. A complete haemoglobin molecule, with four haem groups, can carry three oxygen molecules at a time. Each haem group contains an iron atom.Which term describes both collagen and haemoglobin? Macromolecules Fibrous proteins Globular proteins EnzymesHow many polypeptide chains does a collagen molecule contain? Three One Four TwoAn example of a fibrous protein. Myoglobin Insulin Haemoglobin CollagenA condensation reaction between two amino acids forms the following bond. Peptide bond Glycosidic bond Ionic bond Ester bondWhich of the following is not a disaccharide? Maltose Lactose Sucrose GlycogenWhat is the most important monosaccharide in energy metabolism? Glucose Ribose Galactose FructoseTime is Up!