Search found 9 matches

by vaibhavsmarty
Sat Feb 16, 2008 5:21 am
Forum: Molecular Biology
Topic: Serum IgM cannot activate the complement?
Replies: 1
Views: 2487

Serum IgM cannot activate the complement?

why??????????
four possibilities can be:
a/it does not have complement binding site
b/it is planar in which complement binding sites in the Fc region are not accesible
c/it gets degraded and hence unable to activate the complement
d/it needs metal ions to activate complement
PLZ HELP!!!!!!!!!!!
by vaibhavsmarty
Sat Feb 16, 2008 5:15 am
Forum: Molecular Biology
Topic: Identify the nucleic acid!
Replies: 5
Views: 6496

Identify the nucleic acid!

A nucleic acid sample is resistant to digestion with lambda exonuclease.When heated it does not show typical melting curve of a linear double stranded DNA.On CsCl-ethidium bromide equilibrium density centrifugation it settles at the bottom of the centrifuge tube.The nucleic acid is: a/ccc pBR322 b/B...
by vaibhavsmarty
Sat Feb 16, 2008 5:08 am
Forum: Molecular Biology
Topic: why nucleated cells prevent the complement mediated lysis?
Replies: 0
Views: 1470

why nucleated cells prevent the complement mediated lysis?

Nucleated cells tend to be more resistant to complement mediated lysis than RBC.Why????????
some assumptions i have are that the membrane attack complex gets inactivated hence cannot get inserted into nucleated cell membrane
or MAC cannot get inserted in the nucleated membrane. :roll:
by vaibhavsmarty
Sat Feb 16, 2008 4:55 am
Forum: Human Biology
Topic: Does infection come with fever?
Replies: 4
Views: 3617

well a fever is a physiological response of the organism to help the organism prevent further infections. The heat that is produced as a result of fever is more than enough to kill most of the bacteria present on the outer layer of the skin and thus prevent the organism from catching another infecti...
by vaibhavsmarty
Sat Feb 16, 2008 4:39 am
Forum: Cell Biology
Topic: isotonic solution
Replies: 6
Views: 9637

well that depends in what reference you are talking about.That means whether solution is isotonic with respect to glucose,sodium,or any other macromolecule which may influence the osmotic properties of the cell. If all the factors are kept "isotonic" then the net movement of any molecule w...
by vaibhavsmarty
Fri Sep 07, 2007 1:45 am
Forum: Physiology
Topic: why to fight against HIV....just make ur body strong
Replies: 5
Views: 5305

no mith.....thats a measure of prevention.......by decreasing i meant finding drugs etc. to stop the life cycle of HIV(eg. AZT-azido thymidine)......what m actually saying is that HIV infects only the Th cells that are important members of our immune system due to which the patient dies of some othe...
by vaibhavsmarty
Thu Sep 06, 2007 1:40 pm
Forum: Physiology
Topic: why to fight against HIV....just make ur body strong
Replies: 5
Views: 5305

why to fight against HIV....just make ur body strong

hi everyone,
can anyone of u explain me why can't we work on increasing the number of Th cells in body rather than concentrating on decreasing the viral infection?
by vaibhavsmarty
Tue Sep 04, 2007 1:43 pm
Forum: Human Biology
Topic: what are blood platelets made of?
Replies: 6
Views: 7934

thanx katy that solved ma problem
by vaibhavsmarty
Sun Sep 02, 2007 4:15 pm
Forum: Human Biology
Topic: what are blood platelets made of?
Replies: 6
Views: 7934

what are blood platelets made of?

hey.....
can anyone of u tell me about actual composition of platelets.i've searched the web but everyone mentions about blood constituents and not whether they are cells or something proteinaceous? :?