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VITAMIN A DEFICIENCY
· People in less economical countries such as east Asian
and Africa become blind due to vitamin A deficiency
which is caused by the lack of vitamin A in their diet.
· In order to battle a vitamin deficiency diseases is to
simply balance your diet with the right nutrients.…read more

Slide 3

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WHAT IS VITAMIN A GOOD FOR ?
· Eyesight ­ forms the visual pigment
· Cell growth and development ­forms many
glycoproteins
· Epithelial tissue- differentiation of cells and reduces
the risk of infection.
· Bones ­ growth of bones…read more

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WHERE IS VITAMIN A FORMED ?
· Vitamin A comes from animal sources such
as meat.
· Vegetarians and people without access to
meat get the vitamin from beta-carotene ado
known as a precursor which is then
converted in the gut.…read more

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RICE HAS BEEN ENGINEERED
· Rice plants contain genes that code for the production of
beta- carotene which is a photosynthetic pigment which is
needed in plants.
· But in the grains the genes are switched of do no beta
carotene is formed.
· So what scientist done was to insert two genes into the rice
DNA which activated the endosperm cells.
· They used genes phytoene synthetase which was taken from
daffodils and Crt 1 enzyme extracted form a soil bacterium.
· The genes were inserted into the genome near a specific
prmoter sequence and switched th gene for developing the
endosperm.…read more

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PROBLEMS AND DEVELOPMENT ?
· Although the rice contained beta- carotene large
amounts of rice would be needed to take in enough
beta-carotene.
· So to solves this problem scientists cross bred
different rice varieties to produce Golden rice 2
which made 20 times more beta-carotene meaning
that enough beta carotene could be consumed in
daily amounts.…read more

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