Answer:
C. carrier proteins
Explanation:
The core of the cell membrane is made up of hydrophobic tails of phospholipid. It does not allow the water-soluble material to move across the membrane. Carrier proteins are the membrane proteins that serve as transporters.
The carrier proteins bind the ion or water-soluble molecules and undergo changes in shape. This transports the molecule across the membrane. Carrier proteins serve in passive facilitated diffusion and active transport. The carrier proteins involved in facilitated diffusion transport the molecules down the concentration gradient without any expenditure of energy.
Molecular compound; Molecule
CO2 is an example of a molecular compound or molecule.
A molecule is the smallest particle of a specific element or compound that retains the chemical properties of that element. Molecules are composed of two or more atoms that are joined together by chemical bonds. Molecules may be simple or complex. Carbon dioxide (CO2) is a molecule that contains one carbon atom bonded to two oxygen atoms.
Answer:
Lactose intolerance may be defined as the medical condition in which the individual is not able to digest the products that contain lactose. This might occur due to the improper functioning of the enzyme lacatse. The individual must avoid the milk and related products.
More than 60% of the human population suffers from the lactose intolerance. The population that shows predominantly lactose intolerance are Scandinavian, Northern European ancestry and nomadic peoples of the middle east and Africa.
Answer:
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Explanation:
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