A level Biology: Post your doubts here!

[A*****]

Yeah i understand but what we need to do next? Like we need to find the difference in time between them?

Gives option C

 

[Hisham Khan]

Both of them are close between the time intervals marked with green (between 1&2 + between 3&4)
Sorry it's a bit rough but hope u understand

I did the same thing but there was something wrong in my calculation I suppose

 

[innovative_1]

Both of them are close between the time intervals marked with green (between 1&2 + between 3&4)
Sorry it's a bit rough but hope u understand

But I'm not getting the answer like 0.12 + 0.36 =0.48?

 

[A*****]

But I'm not getting the answer like 0.12 + 0.36 =0.48?

No no you need to take the tym BETWEEN the two intervals so first subtract the time at 2 from 1 to get the time bw the two and similarly for 3 and 4 and finally add them

 

[Hisham Khan]

No no you need to take the tym BETWEEN the two intervals so first subtract the time at 2 from 1 to get the time bw the two and similarly for 3 and 4 and finally add them

A** what is the best way to prepare yourself for the chemistry mcqs.

 

[A*****]

A** what is the best way to prepare yourself for the chemistry mcqs.

Time is the biggest issue in them but practice can surely make everything perfect!
Just do as many papers as u can till the exam day and try to learn from ur mistakes...look through every mcq in detail and know the reasons behind the other options being wrong

 

[A*****]

Why is D wrong for both of them?

 

[Hisham Khan]

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Why is D wrong for both of them?

Q21:Which statement is correct for TUMOUR CELLS ONLY.Tumours cells are not the only cells with mutated dna.
As there is rapid division of tumour cells which is in cancer ONLY,interphase takes less time, is answer.

Q14:Vmax is the maximun rate at which a enzyme works right?.
As substrate concentration is increasing,there will be a time when the enzyme(which is limiting) is saturated with substrate molecules,thus working at it's maximum rate,Changes substrates into products at maximum rate so vmax willnever reach is wrong as potatoes!

 

[Hisham Khan]

You know what?.I didn't know a single thing till march, not even what prokaryotes mean like srsly and how to calculate simple things in chem.
I wasted all my time on silly things and a game called paladins(game like overwatch),I was acting really immature.
I reached Masters (top 2% players in the WHOLE world),so you can see how addicted I was,I feel bad for myself now :/.Maybe I took A levels too lightly after getting A's in phy chem and bio in olevels

 

[Kanekii]

You know what?.I didn't know a single thing till march, not even what prokaryotes mean like srsly and how to calculate simple things in chem.
I wasted all my time on silly things and a game called paladins(game like overwatch),I was acting really immature.
I reached Masters (top 2% players in the WHOLE world),so you can see how addicted I was,I feel bad for myself now :/.Maybe I took A levels too lightly after getting A's in phy chem and bio in olevels

Aye same here ^^ except i watched the walking dead and anime but i did start from December but still the worst part is you usually forget stuff later.

 

[Hisham Khan]

Aye same here ^^ except i watched the walking dead and anime but i did start from December but still the worst part is you usually forget stuff later.

True.Inshallah I might get above 50/60 in paper 2 in chem and A in bio as well if Allah wills but I'm literally shaking.The difficulty of chem mcqs makes you scared lol.

 

[Kanekii]

True.Inshallah I might get above 50/60 in paper 2 in chem and A in bio as well if Allah wills but I'm literally shaking.The difficulty of chem mcqs makes you scared lol.

Insha'Allah we all will get straight As. Lol and i feel the other way around i find bio mcqs more tough than chem MCQs
Tip: Remember every single thing about organic chem, it'll be way more easier to solve organic questions

 

[A*****]

Insha'Allah we all will get straight As. Lol and i feel the other way around i find bio mcqs more tough than chem MCQs
Tip: Remember every single thing about organic chem, it'll be way more easier to solve organic questions

Same here
Chem mcqs are much more logical than those silly bio ones

 

[sukasukinya]

As stated stroke volume is volume of blood pumped by EACH contraction of a ventricle.
So as ventricular end-diastolic volume increases,so will the volume of blood pumped.So A and B are wrong.
but obviously volume pumped will not be proportional to volume pumped,which kinda makes sense because myogenic nature of heart isin't that perfect and power of contraction to pump blood is the same so it will be much difficult to push all the blood!.
So I would say answer is D!

Thank youuu so much

 

[innovative_1]

Why can't be it C??

 

[A*****]

Why can't be it C??

Carbonic anhydrase is only present in RBCs so in order to form CO2 from hydrogen carbonate ions, the ions must first diffuse into RBCs

 

[Hisham Khan]

Is everyone alive?

 

[A*****]

Is everyone alive?

ALMOST DEAD

 

[innovative_1]

Guys how's preparation for physics?? I hardly see someone ever post their doubts

 

[innovative_1]

3 is also correct ig?