Food Flashcards
6 common elements
CHONPS
Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulphur
Elements in dissolved salts
Sodium, Magnesium, Chlorine, Potasium + Calcium
Sophie Makes Chopped Potatoes Carefully
trace metals
Copper, Iron, Zinc
CIZ
Biomolecules
Chemicals made in living things
Biomolecules list
Carbs
Lipids
Proteins
Vits
Are minerals biomolecules
NO!!!
Carbs comp
CHO
Cx(H₂O)v
Monosaccharides
1 sugar
Glucose: releases energy
Fructose: found in fruit
Galactose: comes from lactose
Disaccharides
2 sugars
Maltose (2 glucose)
Sucrose (Glucose + fructose)
Lactose (Galactose + fructose
Formed when 2 monos chemically join, is broken back down into monos
Polysaccarides
Many sugars
Starch: lots of glucose, excess carb in plants
Glycogen: muscle + liver cells, excess carb in humans
Cellulose: plant cell wall + fibre
Chitin
Polysaccharide
Nitrogen added to glucose molecules
Crab exoskelletons + fungal cell walls
Structural role of carbs
Cellulose forms cell walls
Metabolic role of carbs
Glucose releases energy in respiration + is made in photosynthesis
Carb tests
Reducing sugars = Benedicts solution
Starch = iodine
Lipids comp + structure
CHO
fats = solid, oils = liquid at room temp
Triglyreide