Biology Questions and Answers

Biology Questions and Answers

pellagra. Lack of vitamin B6 causes skin

lesions,Vitamin B12 acts irritation and convulsions. together with folic acid (^)
and its deficiency causes cell division
disruptions l(a type of megaloblastic and nutrienteading to pernicious anemia
deficiency anemia).
The absorption oon another substance f vitamin B12 dcalled the intrinsicepends (^)
factor secreted by the gastric mucosa.

9. How does vitamin C act in
   the body? What is the harm
   caused by insufficiency of
   vitamin C? Why was this
   deficiency also known as
   “sailors' disease”?

Vitamin C, in the metabolism of collagor ascorbic acid, pen and it isarticipates
fundamental for the integrity ocapillaries. f blood

Scurvy is thof vitamin C. e disease causeIt is characterized by a lackd by
tissue lesions in the skin, lips, nose and
joints. Scurvy,known as sailors' or scordisease bbutus, was alsoecause in
maritime voyages of the past it was not

commocontained n to get on board food thatvitamin C, like citric fruits. So (^)
the sailors became ill with scurvy.

10. Why isn't the cooking of
    vitamin C-containing foods
    appropriate for vitamin C
    supply?

To obtain vitamin C, fan orange dessert, the vitamin-or example, from

containing food cannot be submitted to

high temperatures (cookingvitamin C is thermolabile, i.e., ) sinceit is (^)
inactivated by heat.

11. What is the association
    between vitamin D and
    sunrays?
    Vitamin D, in the skin by or calciferol, the action of theis synthesized
    ultraviolet raprecursor moleculnge of sunrays upones. Later it is
    transformed into its activeliver and the kidneys. form in the


12. What is the disease
    caused by vitamin D
    deficiency? Which tissue does
    it affect?
    The lack of vitamin D known as rickets (rachitis),causes th e disease
    characterizand bone deformities. Vitamined by decalcification D is of bones
    fundamental for absorption of calcium
    and thus it is related to thtissue health. e osseous


13. What is the function of
    vitamin E? In which foods can
    it be found?

Vitamin E, vitamin that por tocoarticipatespherol, is a f as coenzymat-solublee in (^)
the respiratory chain, the final stage of
the aerobic cellular deficiency may cause sterility,respiration. Its
http://www.biology-questions-and-answers.com