Bio Unit 1 Doubts

[Lost_Life]

post your doubts here and hopefully we'll discuss them

 

[THE FOLLOWER]

Can anyone explain for me the Protein structure?

 

[blossom edward]

does learning all the previous years answer schemes. help???

 

[sylvie3]

Can anyone explain for me the Protein structure?

Proteins have 4 levels in its structure,
1st which is the most important is its primary structure which is the sequence of amino acids in a polypeptide chain held together by peptide bonds .. this determines the final 3d shape in a protein and the final 3d shape allows the protein to carry out its function and if a mutation had occured in its primary stage, then the protein is mutated.
Next is the secondary structure where the amino acids coil into an alpha helix structure or fold into beta pleated sheets, the bonds which hold the amino acids together here are the hydrogen bond.
The tertiary structure is where the amino acids fold and coil further into super coils and if only 1 poly peptide chain was involved then its coiled into it final 3d shape and the bonds here include hydrogen bonds, ionic interactions, hydrophylic and hydrophobic interactions and disulphide bridges.
The quaternary structure is just like the tertiary structure but when it involves more than 1 poly peptide then the poly peptides interact with each other causing it to give its final 3d structure .. (same bonds as tertiary)

Hope this helped .. and goodluck

 

[sylvie3]

does learning all the previous years answer schemes. help???

I suggest you revising the notes over and over again as questions are less likely to be repeated
Goodluck xx

 

[blossom edward]

I suggest you revising the notes over and over again as questions are less likely to be repeated
Goodluck xx

thank u soo much..im sitting for my exam tomorrow...really nervous!!

 

[sylvie3]

thank u soo much..im sitting for my exam tomorrow...really nervous!!

I'm giving mine too, don't stress yourself calm down and lets hope for the best
I'm ready to help if you've got any specific questions though

 

[blossom edward]

I'm giving mine too, don't stress yourself calm down and lets hope for the best
I'm ready to help if you've got any specific questions though

ahaha...not at all..bio anc chem are the only sub..i love thanxx anyways...well if u need help...im there can ask me...anything anytime

 

[sylvie3]

hahaha i dropped chem this year because we had a very rude teacher, bio is my favorite since 3 years and thats the reason iam majoring in biotechnology next year in uni
Goodluck for us both

 

[THE FOLLOWER]

Proteins have 4 levels in its structure,
1st which is the most important is its primary structure which is the sequence of amino acids in a polypeptide chain held together by peptide bonds .. this determines the final 3d shape in a protein and the final 3d shape allows the protein to carry out its function and if a mutation had occured in its primary stage, then the protein is mutated.
Next is the secondary structure where the amino acids coil into an alpha helix structure or fold into beta pleated sheets, the bonds which hold the amino acids together here are the hydrogen bond.
The tertiary structure is where the amino acids fold and coil further into super coils and if only 1 poly peptide chain was involved then its coiled into it final 3d shape and the bonds here include hydrogen bonds, ionic interactions, hydrophylic and hydrophobic interactions and disulphide bridges.
The quaternary structure is just like the tertiary structure but when it involves more than 1 poly peptide then the poly peptides interact with each other causing it to give its final 3d structure .. (same bonds as tertiary)

Hope this helped .. and goodluck

Thanks dear, this helped me a lot thanks again. By the way did you finished your exams?

 

[blossom edward]

hahaha i dropped chem this year because we had a very rude teacher, bio is my favorite since 3 years and thats the reason iam majoring in biotechnology next year in uni
Goodluck for us both

ooohhh...my bad.....im planning to go for dentistry...INSHALLAH we'll ace our exams with flying colors...did u take phy today....and by the way where r u from??? which uni u planning to go in??

 

[sylvie3]

Thanks dear, this helped me a lot thanks again. By the way did you finished your exams?

Most welcome sweetie and no not yet iam still giving my exams .. bio, c2 and aict left for me

 

[sylvie3]

ooohhh...my bad.....im planning to go for dentistry...INSHALLAH we'll ace our exams with flying colors...did u take phy today....and by the way where r u from??? which uni u planning to go in??

By the will of God we can ace them all, and no I dont take physics after I got a B on my olevels i hated it
I live in Dubai and University of Sharjah (if you've ever heard of) is a great choice for btech for me

 

[THE FOLLOWER]

Most welcome sweetie and no not yet iam still giving my exams .. bio, c2 and aict left for me

And I am taking all units expect Physics.

 

[blossom edward]

By the will of God we can ace them all, and no I dont take physics after I got a B on my olevels i hated it
I live in Dubai and University of Sharjah (if you've ever heard of) is a great choice for btech for me

hahahahaha...even i hate it...thought of taking math...but my bad...i have to go abroad or to pak

 

[aniekan]

Urgent _ what's correlation and causation?
__describe DNA replication?
__Describe translation and transcription?
__what is the role of mRNA and tRNA ?

 

[bilquees]

DNA REPLICATION
dna helix unzips to form two single strands.Each strand acts as templates strands. Free floating mononucleotide join to original template strand by complementary base pairing_ Adenine pair up with thymine and cytosine pair up with guanine.The mononucleotide on new strand are joined together by DNA polymearse enzyme. Hydrogen bond forms b/w two strand.

 

[bilquees]

can anyone explains cystic fibrosis plz.

 

[LeeNa MohammeD]

what's a 'codon' and 'anitcodon' and 'antisense' ??? plz help

 

[Angel Aish]

cystic fibrosis is caused due to the defect in the CFTR gene. this gene makes a protein that controls the movement of water in and out of the cell in your body.in ppl with cystic fibrosis the protein dosent work effectively and hence causes thick and sticky mucus and a very salty sweat wich are the main features of CF.
this is how it works...
(1).. CFTR channel is absent or dosent work effectively so the sodium channel doesnt rgulate...as it is sodium channel opens and closes with the help of CFTR...
(2) hence the Na+ channel is permenantely open so the sodium ions cntinue to enter the cell from the mucus thru the sodium ion channel.
(3) the chloride ions are regulated by the CFTR protein and as its abnt the secretion of Cl- ion doesnt takes place..
(4) so water continuesly drains out o the mucus and into the cell by osmosis
(5) wich inturn makes the mucus sticky and thick.
...HOPE THIS HELPED!!!...
if theres any mistake do correct me ..
and yes pray for me !!!