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Search results

  1. L

    cancer cells---metastasis

    Benign tumours are tumours which do not spread in the whole body and remains in their site of production malignant tumours are cancerous dangerous tumours that spread throughout the body and destroys the organs and tissues.
  2. L

    BIOLOGY!

    thank u math angel. :) so, it is basically keeping the pH of the solution constant!
  3. L

    BIOLOGY!

    that really helped. thanks hassam :)
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    wats up wid chem 33

    hamey kia pataa? :P
  5. L

    BIOLOGY!

    salam. i want to know that what is the buffer solution for pH, it will be a great pleasure if anyone can tell me :)
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    Biology Help Needed-->Protein Structures

    yes, i use that book. and it covers all the chapters in the syllabus. some of the points which are not mentioned in the book, are giiven by my teacher.
  7. L

    Biology!-->Denaturation of proteins!!

    Walaikumusalam well the 3D structures of proteins are maintained by the bonds in the tertiary structure so in my book, it says that ionic and hydrogen bonds are broken by high temperatures and pH changes, and disulphide bonds are broken by the reducing agents. so donno wheather ur one is correct...
  8. L

    Chemistry

    lol...exactly. its balanced! :D
  9. L

    Chemistry

    i was going to answer this question :P
  10. L

    Chemistry

    a)i) as boron is a non metal, it loses electrons. see the group number boron is in, then 8 minus (group number) to get the valency number. ii) as boron is a nin metal, predict the properties of non metals, e.g. the are insoluble in water. and they donot conduct electricity. iii) macromolecules...
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    Biology Help Needed-->Protein Structures

    there are 2 forms of proteins in 2ndry structure:- 1) alpha- helix: this is when the poly peptide molecule (protein) is folded into helix(spriral) shape. the -CO of the carboxyllic acid group forms bonds with the -NH of the amine group of the amino acid. this bonding results in the polar...
  12. L

    Biology Help needed-->Amylose in starch!

    seems that math angel is studying biology nowadays :D :P
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    how to study AS level physics?

    hello...welcome :) can u be precise about your question please.
  14. L

    BIOLOGY: Functions os cell membrane!

    Walaikumusalam yes thats true. on the surface of the membrane has glycoproteins(protien molecules to which carbohydrate chains are attached) and glycolipid(lipid molecules to which carbohydrate chains are attached). these carbohydrate chains act like antibody and recognises any foreign...
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    Mitochondria!!

    Walaikumusalam. for the stalked particles:- the mitochondria has 2 membranes, one is the outer smooth membrane and the other inner one is folded in the solutionof mitochondria(matrix). this inner folding is called cristae. On cristae there are small elementary particles(also called stalked...
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    Biology Doubt...Monosaccharides!

    Walaikumusalam yes, u're right..the n is the number of carbon atoms between 3 to 9.
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    need help with FACILITATED diffusion

    large molecules like glucose or ions cannot pass through the phospholipid bilayer, so they pass through the mebrane by hydrophilic channels made by protein transports. the molecules which pass(diffuse*) through the membrane by this process is called facilitated diffusion (the word facilitated...
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    Biological molecules

    ok....these carboxylic acids and amine groups are ionised (they hav a charge) eg. NH2+(from amine group)----------O-(from COOH) the dotted red line shown is the ionic bond.
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    Biological molecules

    okay...you need to now that there are 4 types of protein structures:- 1)primary structure:- this included the sequence, number and types of amino acid arranged in a poly peptide chain. 2)secondary structure:- this is when a polypeptide chain is coiled into an alpha-helix shape (note that these...
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    how to study AS level physics?

    hey hmmmm....maybe my advice works :roll: ok..so if your teacher taught u something today, go home, read the book and the notes she/he gave you, and do the questions in the book YOU SHOULD UNDERSTAND EVERYTHING IN AS LEVELS BECAUSE MEMORIZATION DOESN'T WORK HERE :D if you have any doubts...
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