Food and food tests 🍔🍟 Flashcards
One difference between fat and oils at room temperature
Fats are solid,
Oils are liquid
One difference between a triglyceride and a phospholipid
Triglyceride has three fatty acids,
Phospholipids have two fatty acids
One metabolic role for lipids in cells
Energy
One fat soluble vitamin
D
One deficiency disorder for Vitamin D
Rickets
Two element present in dissolved salts
Sodium,
Calcium
One trace element in the human diet
Iron
Three chemical elements found in lipids
Carbon, hydrogen, oxygen,
CHO
Basic unit that makes up lipids
3 fatty acids joined to a glycerol
What type of metabolic pathway is respiration
Catabolic
What is meant by the term Polysaccharide
Many sugar molecules
Storage polysaccharides found in animals
Glycogen
Two main reasons why food is required by all living organisms
Energy source and
Growth
Ratio of hydrogen atoms to oxygen in a carbohydrate
2:1
Structural role of lipids
Membranes
Main structural polysaccharide in plants
Cellulose
Composition of a triglyceride molecule
3 fatty acids joined to a glycerol
Name test or chemicals used to demonstrate the presence of proteins
Biuret
Name a fibrous protein
Keratin
Where would you find keratin in the human body
Hair and nails
What mineral except calcium is required by plants and it’s role
Magnesium,
Two reasons organisms need water
Transport,
Turgidity in cells
Metallic element in haemoglobin
Iron
Food biomolecule identified by the use of Benedict’s of Fehling’s solution
Reducing sugars
Non metallic element other that C, H, O found in proteins
Sulfur
Metabolic role of proteins in human body
Enzymes
Structural role of keratin in human body
Component of hair and nails
Where would you find phospholipids in human cells
Membranes
Role of named mineral except iron required in the human body
Calcium,
Maintaining bone health
Approx percentage of water, by mass, in a human cell
77%
Simplest units of carbohydrates
Monosaccharides
Catabolic process that produces monosaccharides
Digestion
Common value of y in the carbohydrates used for energy by human cells
6
Polysaccharide, other than cellulose, commonly found in plants
Deoxyribose
Name a monosaccharide
Glucose
One way amino acids differ from monosaccharides in terms of chemical composition
Contains N
What do carbohydrates and fats have in common, in terms of chemical composition
Mostly composed of C, H, and O
How may one fat differ from another, in terms of chemical composition
Different fatty acids
What food type can be identified in the lab by using Sudan III or brown paper
Fats
What colour indicates a strong positive result of the Fehling’s or Benedict’s test for reducing sugars
Red
How many amino acids are found in proteins
20
In relation to a human diet, what is a trace element
Small amount needed
Example of a trace element
Iron
One way oil differs from fat
Oil is liquid at room temperature, fats are solid
Two groups of vitamins depending on their solubility
Fat soluble,
Water soluble
Example of catabolic reaction In a cell
Respiration
In carbohydrates what two elements are in the ratio 2:1
Hydrogen and oxygen
Polysaccharide other than cellulose
Starch
Where in Plant cell would you find cellulose
Cell wall
Test of chemicals used to demonstrate the presence of a reducing sugar
Benedict’s or Fehling’s
Is energy release anabolic or catabolic
Catabolic
