Answer:
The correct answer is ''proteins.''
Explanation:
Transport phenomena are essential in living beings, either to carry a hydrophobic molecule through an aqueous medium (transport of oxygen or lipids through the blood) or to transport polar molecules through hydrophobic barriers (transport through the cell membrane). Biological transporters are always proteins. Proteins are capable of carrying out specific functions such as the selective transport of molecules, or certain enzymatic reactions, among others. Membrane proteins can be peripheral or partially or totally integrated into the membrane, being, generally, globular or fibrous. Its activity is essential for the maintenance of transmembrane gradients. Thanks to membrane proteins, the exchange of molecules such as nutrients or waste products takes place, as well as the reception of external signals. Among its functions are channel-forming: Integral proteins arranged in the membrane in such a way that they give rise to the formation of a pore or channel, usually hydrophilic. These pores or channels allow the entry and exit of certain substances from the cell.
Answer:
The correct answer is option c. "The basic function of fermentation is the regeneration of NAD , which allows continued ATP production by glycolysis".
Explanation:
For bacteria, the basic function of fermentation is not the production of ATP or ethyl alcohol, the basic function of fermentation is the regeneration of NAD+ , which allows continued ATP production by glycolysis. Bacteria normally uses glycolysis for ATP production, it only undergoes fermentation in the absence of oxygen. During bacterial fermentation, a small organic compound as an electron acceptor is used for NADH and regenerates NAD+, this NAD+ is later used in glycolysis for ATP production.
