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hope it helps
if u didnt understand ask me to explain it in more depth and dont mind my writing cuz its on paint
pray to me
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A level Biology: Post your doubts here!
- Thread starter XPFMember
- Start date
hope it helps
if u didnt understand ask me to explain it in more depth and dont mind my writing cuz its on paint
pray to me
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40 EPG=10 micro metres (0.1mm=10 micrometres)
so radius is (50x10)/40 = 12.5 micrometres
Area of a circle=pi x r x r
=pi x 12.5 x 12.5
= 490 micrometres
=4.9 x 10^2 micrometres
(someone explained before)
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Lol go over the questions again. A was that they're extensively folded to allow expansion....C was that they're folded to increase the SA. The answer was A....and in the second question, it said that histamine is released without antibody-antigen binding. See deep down we all know that these answers are damn weird
you gave 12?
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why is ATP needed in companion cells?
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bcz companion cells are there to provide energy for the seive tube cells.... ATP is a source of energy
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I know that
But precisely which step of translocation needs ATP?
1)for pumping H+ ions out of the seive tube (initial step of translocation) or
2)for loading of sucrose
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yes, anyways we have finished p1... so no need further explanations
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i dont know about that.. but i think that it just is there to keep the seive tube celll alive.. and procide energy like respiration and stuff... do confirm from another sourceI know that
But precisely which step of translocation needs ATP?
1)for pumping H+ ions out of the seive tube (initial step of translocation) or
2)for loading of sucrose
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pumping H+ ions out of the companion cell*I know that
But precisely which step of translocation needs ATP?
1)for pumping H+ ions out of the seive tube (initial step of translocation) or
2)for loading of sucrose
and yes, these both needs ATP but priority goes first to H+ ions then sucrose molecules
1.I know that
But precisely which step of translocation needs ATP?
1)for pumping H+ ions out of the seive tube (initial step of translocation) or
2)for loading of sucrose
because its an active transport so it needs atp, its going up the concentration gradient i believe
Me
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How was it?
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How was yours? I've already gotten 5 answers wrong
P12 was full of crap toohow was it ?
for me p 11 was a full crap
Honestly it was horrible how was it?
No it didnt I hope we did well though but no.. some questions were kinda weird