The pentose sugar on RNA is called ribose. (a trick to remember it is that the "R" in RNA stands for ribo)
Hope this helps :)
Fish fossils occur in sediments deposited underwater. That could be sea bottom, lakes, or rivers. Generally, seabottom sediments are raised to the surface by tectonic uplift. Also, when sea level falls during ice ages, sea bottom sediments are exposed to the atmosphere.
Answer:
5' AUGUUUGAUCUU 3'
Explanation:
The nucleotide bases for mRNA are Adenine, Guanine, Cytosine, and Uracil. Uracil replaces Thymine (it's DNA counterpart). From this, you can eliminate options C and D.
Then it is just matching pairs: Adenine = Uracil , Cytosine = Guanine.
3' TACAAACTAGAA 5'
5' AUGUUUGAUCUU 3'
In my opinion mixed layers would be the best choice