A level Biology: Post your doubts here!

[Hisham Khan]

I'll answer
Binding site is shared by O2 and CO only

meh

 

[innovative_1]

I'll answer
Binding site is shared by O2 and CO only

A****** y u answered???

 

[innovative_1]

Don't u want to see the fun??

 

[A*****]

So do u marked yourself? Like hoe much average u secured?

In some 31-32 but that is rare
On avg I get around 35...sometimes above and sometimes below that

 

[A*****]

Don't u want to see the fun??

I knew that u could answer for sure!!

 

[SohaibButt]

Can someone explain abt malaria pls?

 

[A*****]

Can someone explain abt malaria pls?

What??

 

[SohaibButt]

What??

Like in some questions they reject social aspects for its spread but in other it says abt resistance

 

[SohaibButt]

What??

U can check prev posts by hisham

 

[A*****]

The answer to this is D but shouldn't 40 be outside the bracket??

 

[A*****]

Like in some questions they reject social aspects for its spread but in other it says abt resistance

These questions are really confusing...I don't get it

 

[SohaibButt]

The answer to this is D but shouldn't 40 be outside the bracket??

It doesn't matter ig?

 

[A*****]

It doesn't matter ig?

But this means that π is being multiplied by 40 aswell....

 

[Hisham Khan]

Malaria is a non transmissible diseases cause by a PROTOCTISTknown as Plasmodium.Plasmodium ovale or plasmodium vivax which is carried in salivary glands of VECTOR known as female anophele mosquito.MOSUITO GETS PLASMODIUM WHEN THEY TAKE A BLOOD MEAL FROM A PERSON ALREADY INFECTED WITH PLASMODIUM AND THEN THAT MOSUITO CARRY THEM IN THEIR SALIVARY GLANDS AND WHEN MOSQUITO FEED ON ANOTHER PERSON WHO IS UNINFECTED,PLASMODIUM GETS TRANSMITTED IN HIS BLOOD.
PLASMODIUM HAS COMPLEX LIFE CYCLES THATS WHY NO VACCINE HAS BEEN PRODUCED FOR IT.
IT ALSO HIDES IN LUMEN OF INTESTINE TO PREVENT RECOGNITION BY CELLS I GUESS (NOT SURE ABOUT THIS ONE) WHICH IS KNOWN AS ANTIGENIC CONCEALMENT .PLASMODIUM SYMPTOMS OCCUR WHEN MEROZOITES ARE RELEASED FROM RBC.PLASMODIUM MULTIPLY IN RBCS AND WHEN THEY ARE TOO MUCH RBS BURST!. CHLOROQUININE AND MEFLOQUINE ARE COMMON DRUGS TO CONTROL NOT CURE MALARIA
THERE IS MUCH MORE BUT I THINK THIS IS ENOUGH TO ANSWER MCQ QUESTIONS

 

[SohaibButt]

Does anyone knows by changing magnification size of stage micrometer changes?

 

[A*****]

Does anyone knows by changing magnification size of stage micrometer changes?

Yes it does and eye piece remains same

 

[SohaibButt]

Malaria is a non transmissible diseases cause by a PROTOCTISTknown as Plasmodium.Plasmodium ovale or plasmodium vivax which is carried in salivary glands of VECTOR known as female anophele mosquito.MOSUITO GETS PLASMODIUM WHEN THEY TAKE A BLOOD MEAL FROM A PERSON ALREADY INFECTED WITH PLASMODIUM AND THEN THAT MOSUITO CARRY THEM IN THEIR SALIVARY GLANDS AND WHEN MOSQUITO FEED ON ANOTHER PERSON WHO IS UNINFECTED,PLASMODIUM GETS TRANSMITTED IN HIS BLOOD.
PLASMODIUM HAS COMPLEX LIFE CYCLES THATS WHY NO VACCINE HAS BEEN PRODUCED FOR IT.
IT ALSO HIDES IN LUMEN OF INTESTINE TO PREVENT RECOGNITION BY CELLS I GUESS (NOT SURE ABOUT THIS ONE) WHICH IS KNOWN AS ANTIGENIC CONCEALMENT .PLASMODIUM SYMPTOMS OCCUR WHEN MEROZOITES ARE RELEASED FROM RBC.PLASMODIUM MULTIPLY IN RBCS AND WHEN THEY ARE TOO MUCH RBS BURST!. CHLOROQUININE AND MEFLOQUINE ARE COMMON DRUGS TO CONTROL NOT CURE MALARIA
THERE IS MUCH MORE BUT I THINK THIS IS ENOUGH TO ANSWER MCQ QUESTIONS

Ok now explain y in some questions they reject social aspects?

 

[Hisham Khan]

CHANGE IN WAVELENGHT AFFECTS MAGNIFICATION NOT RESOLUTION.
LESS WAVELENGHT OF OBJECT THEN RESOLUTION THEN OBJECT WILL NOT BE VISIBLE.
CHANGING EYEPIECE LENSES DOES NOT CHANGE RESOLUTION
SOME GOOD POINTSS TO REMEMBER

 

[Hisham Khan]

If they ask for social aspects,then you have to include tourism for your answer as I stated blood transfusion from tourist or migrant can cause malaria to go out of hand and difficult to control it as plasmodium PROTOCTIST WILL spread in other person blood
BUT IF THEY DON'T SPECIFICALLY ASK FOR IT DON'T CHOOSE TOURISM MIGRATION ETC

 

[A*****]

CHANGE IN WAVELENGHT AFFECTS MAGNIFICATION NOT RESOLUTION

Isn't it the other way round?