~AS Bio doubts Here !!~

[nidzzz09]

Can any body tell me definition of fluid musaic ? exact definition i want plz plz help me

you mean to say "Fluid mosaic model"
the word Fluid refers to the individual phospholipids and the protein molecules move around within the layer. The word "mosaic" describes the pattern produced by the scattered protein molecule. when the surface of the membrane is viewed from top

 

[arsimme]

Can any body tell me definition of fluid musaic ? exact definition i want plz plz help me

you mean to say "Fluid mosaic model"
the word Fluid refers to the individual phospholipids and the protein molecules move around within the layer. The word "mosaic" describes the pattern produced by the scattered protein molecule. when the surface of the membrane is viewed from top

ya thanx for it. but i wanted to know wot is the roles of phospholipids, cholestrol, proteins , glycolipids and glycoproteins.

 

[nidzzz09]

Can any body tell me definition of fluid musaic ? exact definition i want plz plz help me

you mean to say "Fluid mosaic model"
the word Fluid refers to the individual phospholipids and the protein molecules move around within the layer. The word "mosaic" describes the pattern produced by the scattered protein molecule. when the surface of the membrane is viewed from top

ya thanx for it. but i wanted to know wot is the roles of phospholipids, cholestrol, proteins , glycolipids and glycoproteins.

hey btw which book do yu study from ...

 

[paridhi shobhana]

can u plzzzzz explain :
describe the structure of RNA and DNA and explain the importance of base pairing and hydrogen
bonding;

 

[nidzzz09]

hey why r more branched molecules broken down at a quicker rate ? lke glycogen which has similar structure to amylopectin breaks down at faster rate in animal cell

 

[arsimme]

nidz : I study frm compiled notes given frm my skool and frm mary jones book ..wbu ?

 

[arsimme]

Can anybody tell me two ways in which tetracycline can affect V. cholerae ?
explain why tetracycline shud not b used routinely for all cases of cholera ?

Guys plx help

 

[nidzzz09]

Question:
Suggest two ways in which tetracycline can affect V. cholerae.

bacteriostatic/stop growth/cell wall synthesis/ cell membrane synthesis;stops division/protein synthesis/transcription;disrupts cell wall/membrane function;disrupts translation/DNA replication;acts as enzyme inhibitor;causes lysis;


Question:
Explain why tetracycline should not be used routinely for all cases of cholera.

resistance of bacterium;may recover with oral rehydration only;immune

well if yu want more info http://www.dr-evans.com/advancedbiology ... oleraa.htm

if yu dont understand the answer.... i will explain

 

[nidzzz09]

nidz : I study frm compiled notes given frm my skool and frm mary jones book ..wbu ?

Rght same.... but lke mary jones enugh rght n de pastppr

 

[arsimme]

loolx na na i got ur answers and thanx a lot for it..

btw u r As student or A level ?

 

[arsimme]

nidz : I study frm compiled notes given frm my skool and frm mary jones book ..wbu ?

Rght same.... but lke mary jones enugh rght n de pastppr

yup according to my teacher its enough.

 

[nidzzz09]

loolx na na i got ur answers and thanx a lot for it..

btw u r As student or A level ?

AS who doesnt thnk is gonnnna get A :fool:

 

[arsimme]

ooh haha so u mean i shud not thank u ?

 

[nidzzz09]

ooh haha so u mean i shud not thank u ?

ofc You shud
hey listen what this prosthetic group attached to Amino acids in haemoglobin

 

[paridhi shobhana]

can u plzzzzz explain :
describe the structure of RNA and DNA and explain the importance of base pairing and hydrogen
bonding;

 

[arsimme]

ooh haha so u mean i shud not thank u ?

ofc You shud
hey listen what this prosthetic group attached to Amino acids in haemoglobin

Prosthetic groups

The majority of proteins are assisted in their functions by a prosthetic group. This may a simple metal ion such as zinc in the enzyme carboxypeptidase, or it may be a complex organic molecule, such as the haem group in haemoglobin.

BTw is it included in syllabus ?

 

[arsimme]

can u plzzzzz explain :
describe the structure of RNA and DNA and explain the importance of base pairing and hydrogen
bonding;

The structure of RNA

Ribonucleic acid (RNA) is also a polynucleotide. The chain of nucleotides is formed in exactly the same way as in DNA, but the molecule has some very important differences:

It is a single stranded molecule.
The pyrimidine Thymine never occurs but is always replaced by Uracil, another pyrimidine. (Think "No cup of T for U!")
It is much smaller than DNA.

DNA is a polymer of nucleotides.

Nucleotides are made up of:

a phosphate.
a sugar - deoxyribose.
a base - either adenine, guanine, thymine or cytosine.
In DNA the sugar is always the same but each nucleotide will have only of the four nitrogenous bases. The phosphate sugar and base are linked together

 

[nidzzz09]

ooh haha so u mean i shud not thank u ?

ofc You shud
hey listen what this prosthetic group attached to Amino acids in haemoglobin

Prosthetic groups

The majority of proteins are assisted in their functions by a prosthetic group. This may a simple metal ion such as zinc in the enzyme carboxypeptidase, or it may be a complex organic molecule, such as the haem group in haemoglobin.

BTw is it included in syllabus ?

I guess its written in pg 35 on mary jones book what does it mean its nt made of amino acid i mean isnt part of amino acid already

 

[histephenson007]

Adding to that,

the pentose sugar in a DNA doesn't have an oxygen (somewhere) ...so its called "Deoxyribose" (DNA~ Deoxyribonucleic acid)
)
In case of RNA, it does have that missing oxygen... so its called "Ribose!" (Ribonucleic acid)

 

[filza94]

hmm thanks!!!