Biology

[Youliana]

In the VCE study design for Biology unit 3&4 are you required to know WHY there are 2 hydrogen bonds between Adenine and Thymine and 3 between Guanine and Cytosine? If so, how would you answer such question.

[ChickenCh0wM1en]

In the VCE study design for Biology unit 3&4 are you required to know WHY there are 2 hydrogen bonds between Adenine and Thymine and 3 between Guanine and Cytosine? If so, how would you answer such question.

No. That is more like uni biochemistry stuff.
Just know that AT base pair forms 2 hydrogen bonds while GC has 3 H-bonds. As a result, a DNA molecule with a higher proportion of GC will have more H-bonds and thus be harder to separate with heat.

[Youliana]

No. That is more like uni biochemistry stuff.
Just know that AT base pair forms 2 hydrogen bonds while GC has 3 H-bonds. As a result, a DNA molecule with a higher proportion of GC will have more H-bonds and thus be harder to separate with heat.

Thanks for that!

[Yacoubb]

In the VCE study design for Biology unit 3&4 are you required to know WHY there are 2 hydrogen bonds between Adenine and Thymine and 3 between Guanine and Cytosine? If so, how would you answer such question.

For the VCE Biology course, you are not required to know the number of hydrogen bonds formed between the nitrogenous bases. An understanding that adenine and guanine are purines, whilst cytosine, thymine and uracil are pyrimidines, and the complementary base pairing principles, are sufficient concepts for the VCE course.