Food Flashcards
State a disorder due to dietary deficiency of the vitamin D.
Rickets
Give any two functions of minerals in organism.
1- used to form haemoglobin
2- strenghtens bones and teeths
How does a phospholipid differ from a fat?
Phospholipid: contains phosphate
Fat: does not contain phosphate
Name a monosaccharide
Glucose
Give the formula of Glucose
C6 H12 O6
Name a polysaccharide
Starch
how do amino acids differ from monosaccharide in terms of chemical composition?
Amino acids contain nitrogen
How may one fat differ from another, in terms of chemical composition?
Fatty acid chains joined to glycerol molecule may be different
Which food type may be identified in the laboratory by the use of Sudan ||| or brown paper?
Indicates presence of fat
Give one role for a named mineral in plants.
Calcium needed for cell walls
What colour indicates a strong positive result of the Benedict’s test for reducing sugar?
Brick red colour
Give a role of lipids in cells
Forming cell membrane
Give a role of water in the human body other than as a component of cytoplasm and body fluids.
When body sweats, it cools the body
How many common amino acids are found in proteins?
20
In relation to the human diet, what is meant by a trace element?
Element that is only required in tiny amounts
Give an example of a trace element.
Iron
State one way in which oil differs feom a fat
fats are solid a room temperature
Vitamins may be divided into two groups depending upon their solubility.
Name these two groups.
1) water soluble
2) fat soluble
What is a triglyceride?
Made up of one molecule of glycerol joined to three fatty acids
In carbohydrates,which two elements are in the ratio 2:1?
Hydrogen: Carbon
Cellulose is a polysaccharide. Explain the term polysaccharide.
Poly= many
Many sugar units joined together
Name a polysaccharide other than cellulose.
Starch
Where precisely in a plant cell would you expect to find cellulose.
Cell wall
Name a test used to demonstrate the presence of a reducing sugar.
Benedict’s reagent
Biomolecules of the general formula Cx(H2O)y are examples of?
Carbohydrates
Give two functions of water in a living organism.
- Transport
2. Participates in chemical reactions
Is energy release a feature of anabolic or catabolic reaction?
Catabolic
Name the test used to detect the presence of protein in a food sample.
Biuret Test
Give an example of a catabolic reaction in an animal
Respiration
Give an example of an anabolic reaction in a plant
Photosynthesis
Give an example of a fat-soluble vitamin.
Vitamin A
Give an example of a reducing sugar
Glucose
Give an example of a trace element in the human diet
Zinc
In the human diet zinc, iron and copper are examples of ?
Minerals
The walls of xylem vessels are reinforced with ?
Lignin
Where in a cell would you expect to find phospholipids?
Cell membrane
Vitamin ___ is an example of a water-soluble vitamin.
C
Name a disorder associated with a deficiency of Vitamin C .
scurvy
What are the final products of the digestion of a protein?
Amino acids
Cellulose is an example of a structural ___
Carbohydrate
Fats are composed of oxygen, hydrogen and __?
Carbon
When an iodine solution is added to a food sample and remains red-brown in colour, ___ is absent
Starch
When two monosaccharides unite they form a ___?
Disaccharide
Name a fat-soluble vitamin.
Vitamin D
