Given what we know, we can confirm that the aspect of nucleic acids and transcription that can help explain this discrepancy is that of alternative splicing.
<h3>Alternative Splicing.</h3>
- This process allowed the cells to use a single gene for the creation of various proteins. 
- This process includes the separation of RNA at splicing sites to create new versions of the mRNA strand.
- This helps to increase the diversity of mRNA's available and create more proteins. 
Therefore, given that alternative splicing allows the cells to create multiple forms of distinct proteins from a single gene, this allowed our organisms to develop the vast number of proteins we use, without the need for a much larger genome. 
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Answer: Option B) phosphate; hydroxyl; 3' 
We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the phosphate group attached to the 5' carbon atom of the sugar portion of a nucleotide and the hydroxyl group attached to the 3'
carbon atom
Explanation:
For both RNA and DNA, chemical groups such as phosphate (PO3-) attaches to the 5' carbon of the pentose sugar (deoxyribose in DNA, ribose in RNA). 
While hydroxyl group (OH) attaches to the 3' carbon atom of the pentose sugar.
Thus, a nucleic acid structure structure reveals a several repeating units of nucleotides where nitrogenous base links to a pentose sugar, who in turns is linked to phosphate group 
 
        
             
        
        
        
D.lets things enter or exit the cell