If a DNA molecule has (C+T)/(G+A)=1.95, what can you conclude about the structure of this DNA?

The diploid human genome comprises 6.4 x 10° bp and fits into a nucleus that is 6 um in diameter: If base pairs occur at intervals of 0.34 nm along the DNA helix, what is the (i) length of DNA in the human cell? (ii) If the diameter of the DNA helix is 2.4 nm, what fraction of the volume of the nucleus is occupied by DNA?

Why does DNA with a high A-T content have a lower melting temperature, Tm, than DNA with a high G-C content?

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A B 10 Refer to the following figure. How many H-bonds would be present in the four base pairs that are indicated in this sequence: C) 8 D) 12 TT T·* сссG | | | | & E die

What three components does a nucleotide consist of?

The variable structures of a nucleotide are the sugar and the phosphate group. (a). Say if the statement written above is true or false. (b). Give ONE reason for your answer in part (a).

Why would the nucleotide bases be represented as puzzle pieces, as in the illustration below? What does this representation tell you about how bases pair up? Include in your answer the following terms: adenine, cytosine, guanine, and thymine. A T

Moira, a biochemistry major, wanted to explore the shapes a single-stranded DNA molecule can take. She sketched the two shapes below. Her professor was impressed with Moira’s imagination and artistic ability, but she informed Moira that only one of her sketches was feasible. In the sketches, the lines indicate complementary base pairing. (d) Would a new double-stranded molecule assume the shape similar to one in the drawing? (e) Why or why not?

5' carbon =  3' carbon = hydrogen bond = phosphodiester bond = phosphate group = deoxyribose sugar = nitrogenous base =