mol bio question

[buddindoc]

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can some one explain this?

IF THE GRAPH SHOWN BELOW REPRESENTS DNA CONTAINING NORMAL MIX OF BASES,IT CAN BE EXPECTED THAT THE GRAPH WILL SHIFT TO THE LEFT FOR DUPLEX DNA CONTAINING HIGH CONTENT OF

A)A+C
B)C+G
C)A+T
D)C+T
E)A+G A=ADENINE,C=CYTOSINE,G=GUANINE,T=THYMINE

Y AXIS=OPTICAL DENSITY
X AXIS=TEMP



E
/--------
/ D
/ B
A /
-------- C

 

[buddindoc]

PS I TRIED TO DO THE GRAPH
DID NOT HAPPEN

IT LOOKS LIKE A without the curves


hope this helps 🙂

 

[buddindoc]

god ...LOOKS LIKE A "S" WITHOUT THE CURVES

 

[SoCuteMD]

Ummm...would probably help if you told us what was on the X and Y axes.

 

[G0S2]

can some one explain this?

IF THE GRAPH SHOWN BELOW REPRESENTS DNA CONTAINING NORMAL MIX OF BASES,IT CAN BE EXPECTED THAT THE GRAPH WILL SHIFT TO THE LEFT FOR DUPLEX DNA CONTAINING HIGH CONTENT OF

A)A+C
B)C+G
C)A+T
D)C+T
E)A+G A=ADENINE,C=CYTOSINE,G=GUANINE,T=THYMINE

Y AXIS=OPTICAL DENSITY
X AXIS=TEMP



E
/--------
/ D
/ B
A /
-------- C

I believe A+T is the weakest base pair thermodynamically, therefore, the curve will shift to the left and a molecule of DNA made from a majority of A+T will denature into 2 strands (increasing optical activity) at a lower temp than another piece of DNA (of equal length) with G+C's.

 

[buddindoc]

thanks that is the answer and thanks for xplaining it to me
appreciate it