Macronutrients Flashcards Preview

AS Food Technology > Macronutrients > Flashcards

Flashcards in Macronutrients Deck (17)
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1
Q
What are the 3 main groups of macronutrients?
A
Carbohydrates (sugars and starch), fats (saturated and unsaturated) and protein.
2
Q
Why is starch a vital nutrient in the diet?
A
Source of slow release energy
3
Q
What are carbohydrates the only source of?
A
Dietary glucose
4
Q
What are the two categories of sugars?
A
Intrinsic and extrinsic
5
Q
Which enzyme breaks down starch?
A
Amylase and maltase
6
Q
What is the main differences between fats and oils?
A
Fats are solid at room temperature whereas oils are liquid, fats tend to be saturated and oils tend to be unsaturated.
7
Q
What is the function of fat in the body?
A
- Insulation
- Protection of vital organs
- Concentrated energy source
8
Q
What is the difference between saturated and unsaturated fats?
A
Saturated fats do not contain a double bond between carbon atoms and unsaturated fats do contain them, which results in a kink in the chain
9
Q
What does protein consist of?
A
Compounds of carbon, hydrogen, oxygen and nitrogen as well as chains of amino acids
10
Q
How many different amino acids can be found in plants and animals protein?
A
20, in which 8 of these have to be provided by the diet
11
Q
What are essential amino acids and how many are there?
A
Nine are essential to your diet because your cells cannot manufacture them
12
Q
What is meant by the biological values of foods?
A
How many of the essential amino acids are present, high = all , low = lack one or more
13
Q
Which foods contain a HBV?
A
Animal sources of protein, such as meat, poultry, fish, eggs, milk, cheese and yogurt
14
Q
Which foods contain a LBV?
A
Protein sources from plants include; peas, beans, lentils, cereals such as rice, wheat flour, pasta, nuts & seeds
15
Q
What is the function of protein in the body?
A
- Can act as a secondary energy source if carbohydrates are not present
- Growth and repair of muscles
- Form structural elements of all body cells
16
Q
What is meant by protein complementation?
A
Combining different foods that contain different amounts/combinations of the essential amino acids, in order to gain all of them
17
Q
What are some examples of protein complementation?
A
- Beans on wholemeal toast
- Whole grain rice and peas
- Peanut butter sandwich with wholemeal bread