Food Flashcards
Why do we need water?
- transport blood
- reaction medium
- as a slovent
Why do we need food?
- for energy
- for growth and repair
What minerals are present in food in large quantities?
carbon , hydrogen , nitrogen , oxygen ,phosphorus and sulfur
What minerals are found in food in small quantities?
magnesium, calcium, chlorine , potassium and sodium are found in dissolved salts
What minerals are found in food in trace amounts?
copper iron zinc are needed in tiny amounts
What are biomolecules?
chemicals that are made inside living things
What are simple bimolecular units?
elements in different ratios from biomolecules in food
What are the 4 biomolecules in food?
- lipids
- proteins
- carbohydrates
- vitamins
Test for reducing sugar
benidicts
blue to red
heat but don’t boil
Test for starch
iodine
yellow/brown to blue black
no heat
Test for protein
biuret solution
blue to violet purple
no heat
Test for fat
brown paper
no stain to permanent stain
no heat
What is used as a control in food experiments?
water
What do you do in the food experiments if food is solid?
add water and grind with pestle and mortar.
What do you do if testing starch (precaution)
prepare starch on the day as bacteria will grow if left overnight/ overtime
