primary, secondary & tertiary structure of DNA

[olly_s15]

What bonds contribute to each of these structures?

In different trial paper solutions, i tend to come across different information regarding this..

Lets discuss.

[naved_s9994]

Read Heinemann textbook, Pg 207-208.

[olly_s15]

Read Heinemann textbook, Pg 207-208.

wow thanks you were so much help

*sarcasm

[naved_s9994]

Read Heinemann textbook, Pg 207-208.

wow thanks you were so much help

*sarcasm

Well, as you said you read in different exams, different answers.
I refer you too that, to gain a clear understanding.

[vexx]

i have yet to go over DNA (and proteins yet), but pretty sure:

primary; covalent bonding between nucleotides, and connecting the phosphate and sugar, and the sugar to the nitrogenous base.

secondary; hydrogen bonds between nucleotide groups (3 between GC and 2 between AT)

tertiary; not sure what type of bond this is, since its to do with negative and positive charge of the DNA chain and histones.

[happyhappyland]

Remember primary is covalent bonds... heinemann only briefly talks about that while it rambles on about some other crap

[superflya]

primary: sequence of nitrogen bases.

secondary: H-bonds between nitrogen bases which form the double helix structure.

tertiary: overall 3-D structure, results from ionic bonding between the -ve phosphate group and +ve histones i.e the supercoiling.

[JJ3024]

i only know of hydrogen bond tho...are there any other bonds present???

[olly_s15]

Read Heinemann textbook, Pg 207-208.

wow thanks you were so much help

*sarcasm

Well, as you said you read in different exams, different answers.
I refer you too that, to gain a clear understanding.

well thanks for referring me too that

[cindyy]

Read Heinemann textbook, Pg 207-208.

wow thanks you were so much help

*sarcasm

lol! haha

primary structure have covalent bonds
secondary structure have hydrogen bonds between A-T and C-G
not sure about tertiary :S

[happyhappyland]

Read Heinemann textbook, Pg 207-208.

wow thanks you were so much help

*sarcasm

lol! haha

primary structure have covalent bonds
secondary structure have hydrogen bonds between A-T and C-G
not sure about tertiary :S

DNA is negatively charged, they wrap around positively charged histones to form a tight chromosome

[cindyy]

histones? are we supposed to know about them in a lot of detail?

[olly_s15]

histones? are we supposed to know about them in a lot of detail?

no, no great deal of detail

just that they are positively charged and the dna fragments are negatively charged and coil around them tightly due to ionic interactions

[cindyy]

histones? are we supposed to know about them in a lot of detail?

no, no great deal of detail

just that they are positively charged and the dna fragments are negatively charged and coil around them tightly due to ionic interactions

cool! thats good

[stonecold]

As superflya says, isn't primary structure the ordering of nitrogenous bases?