The right answer is polarity.
In chemistry, polarity is a characteristic describing the distribution of negative and positive charges in a dipole. The polarity of a bond or a molecule is due to the difference in electronegativity between the chemical elements that compose it, the differences in charge that it induces, and to their distribution in space. The more the charges are distributed asymmetrically, the more a bond or molecule will be polar, and conversely, if the charges are distributed in a completely symmetrical manner, it will be apolar, that is to say non-polar.
Polarity and its consequences (van der Waals forces, hydrogen bonding) affect a number of physical characteristics (surface tension, melting point, boiling point, solubility) or chemical (reactivity).
Many very common molecules are polar, such as sucrose, a common form of sugar. The sugars, in general, have many oxygen-hydrogen bonds (hydroxyl group -OH) and are generally very polar. Water is another example of a polar molecule, which allows polar molecules to be generally soluble in water. Two polar substances are very soluble between them as well as between two apolar molecules thanks to Van der Waals interactions.
<span>the portion of an antigen that binds covalently to an antibody</span>
All the cells in an organism should have the same no. of chromosomes i.e. in this case 23 pairs , as each cell carries the same DNA .
It is usually the process of converting an item from one form to other and its meaning and purposes differ as per the scientific/business/engineering practices referred.
In genetics, It is the process of making an RNA copy of a gene sequence. This copy, called a messenger RNA molecule, leaves cell nucleus and enters the cytoplasm where it directs synthesis of the protein, which it encodes.