HELP PLEASE Methyl bromide (CH3Br) a. is of greater concern from its oral toxici
ID: 171880 • Letter: H
Question
HELP PLEASE
Methyl bromide (CH3Br)
a.
is of greater concern from its oral toxicity than from its inhalation toxicity
b.
is a liquid used primarily as a fumigant
c.
has essentially no warning properties, even at physiologically hazardous concentrations
d.
is extremely flammable
The formation of ATP:
a.
is the result of cellular respiration
b.
requires PADI or PADIH2 electron carrier proteins
c.
does not require ATP synthetase
d.
cannot be affected by sublethal doses of toxins
a.
is of greater concern from its oral toxicity than from its inhalation toxicity
b.
is a liquid used primarily as a fumigant
c.
has essentially no warning properties, even at physiologically hazardous concentrations
d.
is extremely flammable
Explanation / Answer
Methyl bromide is a fumigant used by farmers against various pests. It is a gas, non-inflammable in nature. It has severe effects on ozone layer and hence its usuage hs been reduced. It is found to have various effects on human beings and severe cases it may even lead to paralysis, coma and even death. Methyl bromide binds to various macromolecules of cells like DNA, fats and proteins.Lethal dose (LD) of methyl bromide in case of oral toxicity was found to be <50 mg/kg while in case of inhaltion toxicity it was found to be <0.05 mg/lt. That means methyl bromide has higher concern in regard of inhaltion toxicity than oral toxicity (Lesser the LD value higher its toxicity level). Though it is a gas, it is even supplied in the form liquified gas. Hence I would suggest, option B as a correct answer.
The formation of ATP:
Adenosine triphosphate (ATP) an energy unit of the cell essential for any biological process which requires energy supply. It is formed within mitochondria (power house of cell) as a result of cell respiration. Glucose converts into pyruvate through glycolysis in cytosol of cell. Pyruvate gets converted to acetyl Co-A which traverse mitochondira wherein enters krebs cycle. Krebs cycle produce many ATPs, NADPs, GTPs and FADPs which are ultimately utilized in electron transport chain for the production of energy. ATP synthesis requires ATP synthase enzyme. Hence I would suggest option A as a correct answer.
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