Answer:
TRANSCRIPTION
Explanation:
Transcription is the first process that occurs in the expression of a gene. It involves the synthesis of a mRNA molecule from a DNA template. The DNA molecule, which is located in the nucleus of an eukaryotic cell, is bound to by an enzyme called RNA polymerase in order to synthesize an mRNA molecule/strand. 
RNA polymerase synthesizes a mRNA molecule using complementary base pairing rule i.e. Uracil base (U) is synthesized when Adenine (A) is read, Adenine when Thymine (T) is read, Guanine (G) when cytosine (C) is read, Cytosine when guanine is read. These nucleotide bases are then joined together via chemical bonding. 
In a nutshell, RNA polymerase catalyzes the formation of a bond between the backbone sugar of one nucleotide base to the backbone phosphate of another nucleotide base in the metabolic process of TRANSCRIPTION. 
 
        
             
        
        
        
The correct option is D.
If water density at freezing point is greater, the ice formed will sink to the bottom of the water body and freeze the water up from the bottom. This will surely lead to the death of everything that live inside the water.
        
                    
             
        
        
        
Dietary fats are necessary for providing energy to your body and supporting cell activity. They also aid in the protection of your organs and the preservation of your body's heat. Fats aid in the absorption of certain nutrients and the production of key hormones.
<h3>
What is cholesterol?</h3>
Cholesterol is a waxy, fat-like molecule found in all of your body's cells. Cholesterol is required by your body for the production of hormones, vitamin D, and chemicals that aid digestion. Your body produces all of the cholesterol that it requires.
Fatty acids provide an ideal anisotropic solution for other membrane constituents due to their existence in bilayer membranes. They give the membrane bilayer fluidity, allowing membrane-bound receptors, enzymes, and other proteins to diffuse laterally along the bilayer membrane's surface.
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