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# of protons, electrons, and neutrons

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# of protons, electrons, and neutrons

Postby StudentGuy789 » Sun Sep 10, 2006 10:29 pm

1.) How many protons, electrons, and neutrons are in the following:

C atom
C atom w/ mass # = 14
N atom w/ mass # = 14
Ca atom
Ca +2 ion
H+ ion

I'm not sure about the ions the most.

2.) What level of protein structure changes the three dimensional shape of a polypeptide because of a variety of types of interactions between side chains of amino acids?

I think its secondary or teritary structure but I'm not sure which one.

Thanks
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Postby canalon » Mon Sep 11, 2006 1:50 am

1) Give us your answer and we will correct.

2) Define secondary and tertiary structure.
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Postby StudentGuy789 » Mon Sep 11, 2006 4:49 am

1.) protons, electrons, neutrons

C atom: 6,6,6
C atom w/ mass # = 14: 6,6,8
N atom w/ mass # = 14: 7,7,7
Ca atom: 10,10,10
Ca +2 ion: 12,10,10
H+ ion: 1,0,1

2.) secondary structure has only hydrogen bonds between the repeating constituents of polypeptide backbone. Can look like a helix or platlettes (sp?).

teritary structure is the overall shape of a polypeptide resulting from interactions between the side chains of the various amino acids.

I've asked my biology teacher and he said it was secondary. I talk to another biology teacher and he said it was teritary. So which is it? :?:
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Postby baikuza » Mon Sep 11, 2006 6:02 am

Carbon
atomic weight: 12
C (neutral atom)
proton: 6
electron : 6
1s2; 2s2; 2p2
neutron? look at the equation in the book of basic chemistry.. hehe.

Nitrogen
atomic weight: 14
N (neutral atom)
proton: 7
electron : 7
1s2; 2s2; 2p3
neutron? look at the equation in the book of basic chemistry.. hehe.

Calsium
Ca (neutral atom)
Proton: 20
electron: 20
[Ar] 4s2
neutron? look at the equation in the book of basic chemistry.. hehe.

2. 3D of protein represented in its tertiary structure.. and the more structure for its interaction with other compound is by quarternary structure...
can you extract what i mean?
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Postby oppox » Mon Sep 11, 2006 11:12 am

well its pretty easy, the atomic number tells u how many protons, if the atom is neutral it has the same number of electrons. The charge is regulated by the electrons, if it is a singel negative charge it has one electron more and so on.
substract the atom number from the atom weight to find out how many neutrons u have, basicly.
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Postby baikuza » Tue Sep 12, 2006 9:27 am

haha...
you get it.
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