The gases being released from the ground
        
                    
             
        
        
        
Answer:
A. Archaea / Bacteria
Explanation:
Bacteriorhodopsin is a protein used by Archaea, most notably by halobacteria, a class of the Euryarchaeota. It acts as a proton pump; that is, it captures light energy and uses it to move protons across the membrane out of the cell 
Bacteriorhodopsin is an integral membrane protein usually found in two-dimensional crystalline patches known as "purple membrane", which can occupy up to nearly 50% of the surface area of the archaeal cell.
Proteorhodopsin also known as pRhodopsinbis a family of over 50 photoactive retinylidene proteins, a larger family of transmembrane proteins that use retinal as a chromophore for light-mediated functionality, in this case, a proton pump
 
        
                    
             
        
        
        
The functions that both the nerve cells and muscle cells
have in common are the following;
-         
Both cells are excitable
-         
They both experience voltage difference in the
cell membrane
-         
The cell membrane of both of cells has electrochemical
impulses
 
        
             
        
        
        
Primary= peptide bonds
secondary= hydrogen bond 
tertiary= weak bonds, hydrophobic, disulfide bridges, salt bridges 
quaternary= between polypeptides 
        
             
        
        
        
Answer;
-NAD+ 
Explanation;
-When glucose breaks down into ATP, a large amount of the energy is stored as electron on special molecules (the electron carriers). When an empty electron carrier accepts a pair of electrons, it is reduced; when it gives those electrons up later on, it is oxidized. 
-NAD+ and FAD; also the two most common electron carriers in the body. NAD+ can accept a pair of electrons (and a hydrogen ion) to become NADH.