biology assignment help by http://myassignmenthelp.net/biology-assignment-help.php

1. WHY TOMATO (ANTIOXIDANTS) GOOD FOR
HUMAN HEALH……….
Tomato is a fruit but it is used in the form of vegetable around the globe,
belonging to the family Solonaceae. It is a perennial crop with average height of
plants. Its commercial as well as nutritive value is very high. Now the question
arises that why nutritive value of tomato is high. Because of the presence of
contents like Antioxidants and Lycopene present in it.
WHAT IS ANTIOXIDANTS ….
Antioxidant is a molecule that inhibit the oxidation of other molecule. In the
process of oxidation electron from any substance transfer to the oxidizing agent. In
the process of oxidation free radicals released and a cycle get started which cause
the death of plant, but antioxidants prevent the plant from this injury or death.
Antioxidants are present in triplet state of oxygen. So when free radicals comes in
cycle ,they receives that and form a molecule.
Antioxidants also differentiated into two parts, enzymatic and non-enzymatic.
carotenoid, Lycopene, Ascorbic acids, Proline, Phenol have comes in non-
enzymatic and Ascorbic acid oxidase, Superoxide dismutase, Peroxidase,
Glutathione, Catalase have come in enzymatic antioxidants. Basically presence and
support of enzymes differentiate the enzymatic and non enzymatic antioxidants.
. Another term reactive oxygen species(ROS) produced in a cell like hydrogen
peroxide, hypochlorous acid, and free radicals like hydroxyl radical and superoxide
anion. Hydroxyl radicals are unstable and react rapidly with many biological
molecules finally cause the DNA damage and cause mutation. Peroxide is also
produced from the oxidation of reduced flavoproteins, such as complex.
Enzymatic antioxidants play a important role like, superoxide dismutase , in which
superoxide anion breakdown occurs in the form of oxygen and hydrogen peroxide,
also works as preservatives. Low level of antioxidant causes the oxidative stress
that initiate the different diseases. These antioxidants and other contents like
lycopene, vitamin-A, vitamin-C are helpful for the prevention of coronary heart
disease, lung problem, inflammatory disease, eye and skin problems Sunlight and
Oxygen works as oxidizing agent for food. So if we keep fruits in dark due to

2. antioxidants it will be fresh for long time. Antioxidants also use in industrial
purposes also in the form of stabilizers in fuel and in lubricants.
Antioxidants neutralize free radicals as the natural by-product of normal cell
processes, free radicals are more reactive than other molecules that complete their
electron shells. In human body the most common source of free radicals is oxygen,
when oxygen is present in charged form , its receive the electron from the other
molecules and cause DNA damage and overgrowth of cells called tumor or cancer
and this damage can not be irreversible. Antioxidants is the very important things
that neutralize the free radicals and fervent them to receive electron from their.
If Antioxidants is so important for human health then we need to search the things
that are rich of antioxidants. Apple , Lettuces, carrot are rich of vitamin –A and
beta carotene, Citrus, orange, Amla is rich of vitamin-C or ascorbic acid. But
most importantly Tomato is the only vegetable that provide highest amount of
antioxidants, vitamin -A, vitamin -C, Lycopene and beta carotene that help to
prevent us to cancer, eye problem and skin diseases. That’s why Tomato is very
good for human health.