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  1. Saad (سعد)

    A level Biology: Post your doubts here!

    There's no other reason. 100%. The only time carbon dioxide combines with haemoglobin to stimulate the haemoglobin to release oxygen is when it forms carbaminohaemoglobin, or the hydrogen atoms add to the haemoglobin to form haemoglobinic acid. Carboxyhaemglobin has no role here. Don't...
  2. Saad (سعد)

    A level Biology: Post your doubts here!

    Error in the Mark Scheme. They meant to write 'carbamino-haemoglobin'. We should sue those Examiners... they deduct our marks when we get it wrong, but when they get it wrong, they're totally silent about it. :cautious:
  3. Saad (سعد)

    A level Biology: Post your doubts here!

    Thanks. Can someone please tell me an outline of the sequence in an Immune Response.
  4. Saad (سعد)

    A level Biology: Post your doubts here!

    Urgent. What's the function of the enzyme helicase and the enzyme DNA Polymerase.
  5. Saad (سعد)

    Why Islamic Studies?

    No, the majority of the Zionist State of Israel and Zionist State of Israeliophiliac Truthophobes supports your views. That's because your own Lord lets you do that, so you can enjoy yourself and find 'peace' in your own baseless, illogical, biased, lies for the 40-80 year-old life you may live...
  6. Saad (سعد)

    A level Biology: Post your doubts here!

    I think you mean 'plaque'... with a 'q'... don't write 'plague', its something entirely different. :cautious:
  7. Saad (سعد)

    A level Biology: Post your doubts here!

    Have a general idea. They've asked questions referring to that several times.
  8. Saad (سعد)

    A level Biology: Post your doubts here!

    Vaccination causes our antibodies to produce faster if a disease strikes us after its administered; so fast, that we don't feel the symptoms of the disease at all. The pathogen is destroyed almost instantaneously upon entering. Basically, in vaccination, a disabled form of the pathogen is...
  9. Saad (سعد)

    Post Your AS LEVEL PHYSICS PAPER 2 DOUBTS

    Why are there two threads for the same thing? Okay... In the syllabus, we have: (e) describe the effect of a uniform electric field on the motion of charged particles. And in the notes, I have things like Equipotential Surface, Potential Gradient, and 'Electric field lines must meet the...
  10. Saad (سعد)

    Physics: Post your doubts here!

    Okay... In the syllabus, we have: (e) describe the effect of a uniform electric field on the motion of charged particles. And in the notes, I have things like Equipotential Surface, Potential Gradient, and 'Electric field lines must meet the surface at right angles'. ... What in the...
  11. Saad (سعد)

    Physics: Post your doubts here!

    In dsinϑ = nλ, ϑ is the angle between the diffracted ray and the grating's normal vector (the straight line from the centre of the grating - the normal zero order - to the screen). If the light strikes at an angle, it will also leave at an angle (as shown in the diagram in the question). If we...
  12. Saad (سعد)

    Physics: Post your doubts here!

    As-Salaamu 'Alaykum wa Rahmatullah. Someone please help me understand the concept of phase difference, and how a constant phase difference results in coherent waves. I do have the general idea, but a revision could be useful, just so I don't miss anything. And a bit easy on the radians...
  13. Saad (سعد)

    ᴊυѕт ᴀ ғᴇω мᴀɢɪсᴀʟ ωᴏяᴅѕ

    سبحان الله "Glorified be Allah beyond imperfections." الحمد لله "Praise (and gratitude) be to Allah." لا إله إلا الله "No god but Allah." الله أكبر "Allah is the Greatest." ولا حول ولا قوة الا بالله "And there is neither might nor power except with Allah." لا إله إلا الله محمد رسول...
  14. Saad (سعد)

    Quran and Modern Science

    Jazak Allah Khayran Kathira.
  15. Saad (سعد)

    A level Biology: Post your doubts here!

    Yup, you gotta know about all three ways in which carbon dioxide is transmitted; carbamino-haemoglobin (10%), bicarbonate ions (85%) and in solution form inside the blood plasma (5%). If you have the Mary Jones book, read the 'Carbon dioxide transport' article on page 111. Its simple, easy to...
  16. Saad (سعد)

    A level Biology: Post your doubts here!

    CO2 transport is in the syllabus. They've asked about it in the past papers, I'm sure. Antibiotics are ineffective against viruses because viruses are entirely different from other life forms in many different ways (there's even a debate about whether viruses are actually living things to...
  17. Saad (سعد)

    Evident Signs

    As-Salaamu 'Alaykum wa Rahmatullah. The intention behind my post was to make us realize, that whether on the national level in the case of Thamud, or on a personal level, whoever desires only this world will get it - Thamud was in its time like America is today, a superpower. But the end...
  18. Saad (سعد)

    People out there......please read this. It's a sad story about my chemistry practicals.

    Jazak Allah Khayr. Its a fact, that we can view today. Take a look at this, if you have the time. Evident Signs.
  19. Saad (سعد)

    Evident Signs

    Aodhubillahi min as-shaytanir-rajeem. Bismillahir-Rahmanir-Raheem. Al-Hamdulillahi Rabbil-'Alameen. Allahumma Salle 'ala Sayyidina Muhammadinin-Nabiyyil-Ummiyi wa Aalihi wa Barik wa Sallim. Allahumma Salle 'ala Sayyidina Muhammadin, Kullama Zakarahuz-Zakiroona wa Kullama Ghafala 'An...
  20. Saad (سعد)

    ᴊυѕт ᴀ ғᴇω мᴀɢɪсᴀʟ ωᴏяᴅѕ

    سبحان الله "Glorified be Allah beyond imperfections." الحمد لله "Praise (and gratitude) be to Allah." لا إله إلا الله "No god but Allah." الله أكبر "Allah is the Greatest." ولا حول ولا قوة الا بالله "And there is neither might nor power except with Allah." لا إله إلا الله محمد رسول...
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