ALL CIE BIOLOGY DOUBTS HERE !!!

[Vampire-Love4ever]

Some one please help me with this! I don't have the official answer for this. I want to compare my answer with whoever helps me! =)

1-Bowman's Capsule/Renal Capsule
2-Glomerulus
3-Afferent Arteriole
4-Efferent Arteriole
5-Proximal Convoluted Tubule
6-Distal Convoluted Tubule
7-Collecting Duct
8-Loop of Henle
9-Vasa Recta


PLEASE CORRECT ME IF I AM WRONG!

[elemis]

Here.

[Vampire-Love4ever]

Can someone please explain this?

[Vampire-Love4ever]

Here.

Thank you.

[**RoRo**]

Just a quick question, are we supposed to know the 4 different classes of antibodies [IgG, IgM, IgA, IgE] and their functions, sites of action, number of antigen binding sites and their relative molecular mass?

[Master_Key]

Just a quick question, are we supposed to know the 4 different classes of antibodies [IgG, IgM, IgA, IgE] and their functions, sites of action, number of antigen binding sites and their relative molecular mass?

As such you just need to know that which is heavier for your safety. I haven't seen any paper which asks for such detailed description but you may remember it.

[Vampire-Love4ever]

Can someone please explain this?

No one? :S

[**RoRo**]

As such you just need to know that which is heavier for your safety. I haven't seen any paper which asks for such detailed description but you may remember it.

mmmm, there's alot that comes under 'study to be on the safe side for bio'! :s
Thank you very much though!

[Master_Key]

mmmm, there's alot that comes under 'study to be on the safe side for bio'! :s
Thank you very much though!

Study to be on safe side.
Welcome

[**RoRo**]

Just a couple of questions here,

Specimen paper 2001, Q3 a iii) - What's the answer?
Specimen paper 2001, Q4 is about genetic engineering, is that part of our syllabus?
Specimen paper 2001, Q3 b) - What's the answer?

Can anyone please send me the link to the MS of this paper?

[Vampire-Love4ever]

Explain the relationship between action spectrum and absorption spectrum.

[**RoRo**]

How do we know what type of inhibitor the chemical/substance that is added is?
Example: Q3 a iii) on this paper: http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w10_qp_23.pdf
How do we know it's a non-competitive/irreversible inhibitor?

& someone please answer my previous questions:

Just a couple of questions here,

Specimen paper 2001, Q3 a iii) - What's the answer?
Specimen paper 2001, Q4 is about genetic engineering, is that part of our syllabus?
Specimen paper 2001, Q3 b) - What's the answer?

Can anyone please send me the link to the MS of this paper?

[Master_Key]

How do we know what type of inhibitor the chemical/substance that is added is?
Example: Q3 a iii) on this paper: http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w10_qp_23.pdf
How do we know it's a non-competitive/irreversible inhibitor?

& someone please answer my previous questions:

Just a couple of questions here,

Specimen paper 2001, Q3 a iii) - What's the answer?
Specimen paper 2001, Q4 is about genetic engineering, is that part of our syllabus?
Specimen paper 2001, Q3 b) - What's the answer?

Can anyone please send me the link to the MS of this paper?

Cu²⁺ ions are not the shape of sucrose so it is non-competitive.

[Amelia]

How do we know what type of inhibitor the chemical/substance that is added is?
Example: Q3 a iii) on this paper: http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9700%20-%20Biology/9700_w10_qp_23.pdf
How do we know it's a non-competitive/irreversible inhibitor?

Like MK said, Cu+ ions are not the shape of the sucrose so they do not attach themselves in the active-sites of the enzymes but elsewhere in the enzyme molecule. They alter the shape of the enzyme in such a way that the active site can no longer accomodate the substrate. As the substrate & inhibitor molecules attach on different parts of the enzyme, they are not competing for the same sites (non-competivite). Also, metal ions break the disulphide bonds(that help maintain the shape of the enzyme molecule). This causes the enzyme molecule's structure to be irreversibly altered.

& someone please answer my previous questions:

Attach the questions please. 

[Amelia]

Explain the relationship between action spectrum and absorption spectrum.

An action spectrum is a graph showing the effectiveness of different wavelengths of light in stimulating the process being investigated. An absorption spectrum is a graph of the relative amounts of lights absorbed at different wavelengths by a pigment.

An action spectrum for photosynthesis is shown together with an absorption spectrum for the combined photosynthetic pigments.

http://5e.plantphys.net/images/ch07/wt0701c.png

NOte the close similarity, which indicates that the pigments, cholorophylls in particular, are those responsible for absorption of light in photosynthesis.