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WorksheetsAntioxidants
Total questions: 20
Worksheet time: 19mins
Atom or molecule with an unpaired electron is
free trial
cubalah
free radical
air pollution
Types of antioxidants except
Phytonutrients
Ascorbic acid
D-alpha tocopherol
Benzene
ORAC number stands for
Oxygen Radical Absorbance Capacity
Oxygen Radical Abandon Capacity
Oxidative Radical Absorbance Capacity
Which of the following is water soluble antioxidant?
Vitamin A
Vitamin C
VItamin E
Coenzyme Q 10
Fruits, vegetables, and cereal are good source of:
Antioxidents
Unsaterated fat
Saturated fat
Free radicules
The only fat-soluble antioxidant synthesized in the body is?
Vitamin D
Thiamine
Ascorbic acid
CoQ10
Free radicals contain -------- electrons
(a)
Hydroxyl radical is -------- type free radical
ROS
RNS
Others
Oxidation involves
Loss of electrons
Gain of electrons
Increase in the valency of negative part
Decrease in the valency of positive part
Antioxidants are substances:
that have some effect on preventing or retarding oxidative deterioration in foods.
that opposes oxidation or inhibits reactions promoted by oxygen or peroxides
capable of counteracting the damaging effects of oxidation in animal tissues.
All of the above
Reactive sites of lipids for oxidation:
Ester bond between Glycerol and fatty acid
Long chain fatty acids
Unsaturated bonds
Phytosterols
Antioxidants mode of action includes ________ and __________ action.
(a)
Which of them is a synthetic antioxidant?
Tocopherol
Flavonoid
Rosemary extract
Anoxomer
Synergistic Antioxidants means
combinations enable more complete distribution or solution of antioxidants and chelating agents in fats and oils
Thiodipropionic acid is a slightly effective antioxidant when used alone in lard, but it is a powerful synergist when used in combination with BHA
Antioxidants are combined to take advantage of their different types of effectiveness.
Some compounds, which by themselves have very little effect on the oxidation of fats, may enhance or greatly prolong the antioxygenic action of primary antioxidants.
Good carry-through property means
free radicals are carried away
natural antioxidants effectiveness
Strong odor of antioxidants
Stability of antioxidants at high temperature
The rate of oxidation is determined by :
Ease of hydrogen abstraction
Solubility of oils in water
Not determined by any factor
number of double bonds
The oxidation reactions of polyunsaturated lipids are most successfully prevented by avoiding initiation.
True
False
Metal chelators such as ethylenediaminetetraacetic acid (EDTA)
Binds with metals
Reacts with metals
are metals themselves
All of the above
Tocopherols are the most active chain-breaking antioxidants
True
False
Oxidative stress causes
Immunity increase
Inflammatory disease
Good complexion of skin
Healthy body
