00:01
Hello students, today will be solving a question in biology.
00:03
As you can see, if there is an excess of reactive oxygen species, okay? if there is an excess of reactive species, which we commonly refer to as ros in a system, where would the problem least likely be found? where would the problem least likely be found? so this question is asking about reactive oxygen species and if there is an excess of this reactive oxygen species where would the problem least likely be found and the options they've given us are option a electron transport chain okay electron transport chain option b they given us is superoxide dismutase superoxide dismutase option c they given us is catalase which is an enzyme option d they given us is glycolysis and finally option e they've given us as mitochondria so in this question they're asking us that if there is an excess of reactive oxygen species in a system then where would the problem least likely be found so the answer for this question will be superoxide dismutase because the enzyme dismutase is extremely functional because it helps in protection of cells.
01:43
It protects cells from reactive oxygen species.
01:48
Reactive oxygen species are nothing but oxygen -free radicals that can damage cells.
01:55
They are oxygen -free radicals that float in the body and has the capacity to damage our body cells.
02:05
So therefore, this enzyme, superoxide -dismutase helps in protection.
02:10
Of our cells from this reaction oxygen species.
02:16
Now how this protects is that this enzyme protects the cells from action of reactive oxygen species by converting the superoxide radicals into hydrogen peroxide and molecular oxygen.
02:28
So they take the superoxide which are floating as free radicals convert them into hydrogen peroxide and normal o2.
02:37
Later catalase convert the harmful hydrogen peroxide into the same.
02:40
To water and oxygen.
02:42
As we know, hydrogen peroxide is detrimental to human health.
02:47
So, an enzyme called catalase is used for catalyzing the conversion of h2o2 into normal h2 plus molecular oxygen.
03:04
So when reactive oxygen species increases the subsequent production and action of superoxide dismutase also increases.
03:10
Then, ros production or ros number increases, then frequent increase in the number of superoxide dismutase enzyme.
03:25
The number of superoxide dismutase enzyme also increases number in the system...