The fist one is (a) and the send is (d)
<span>The question says,' structurally DNA and RNA are similar although their three basic component differ slightly. One way DNA and RNA differ is in thier ............ DNA is a long chain polymer with deoxyribose and phosphate backbone, it has four different nitrogenous bases: thymine, adenine, cytosine and guanine. RNA is a long chain polymer with a ribose and phosphate backbone, it has four nitrogenous bases: guanine, cytosine, adenine and uracil.</span>
Answer:
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
Explanation:
Chargaff's Rule:
- Erwin Chargaff, an Austrian chemist investigated the amount of the four nitrogenous bases in a sample of DNA.
- Chargaff observed that the purines and pyrimidines existed in a 1:1 ratio. The concentration of thymine was equal to that of adenine. Moreover, the concentration of cytosine was equal to that of guanine.
- On the basis of the ratios, Chargaff proposed that, in DNA, adenine (A) always pairs with thymine (T) and cytosine (C) always pairs with guanine (G).
<span>Colorado Plateau
A plateau is a raised flat area of land. (Remember it must be a large area of land)
</span><span>
</span>