1.
Primary Structure : It refers to refers to the sequence of amino acids in the polypeptide chain.
2.
Secondary Structure : Within the long protein chains there are regions in which the chains are organized into regular structures called
Alpha Helix (
![\alpha](https://tex.z-dn.net/?f=%20%5Calpha%20)
- helix ) and
Beta - pleated sheets . Hydrogen bond is present in secondary structure.
3.
Tertiary Structure : The overall three dimensional structure of polypeptide chain is called Tertiary structure.
Hydrogen bonding,
ionic bonding,
dipole-dipole interactions
, Disulfide bonding are present in tertiary structure.
4.
Quaternary Structure : The polypetide chain aggregates and the protein contains more than one amino acid chain. This is Quaternary structure.
Hydrogen bonding is present in them.
The answer is B. Finding ways to irrigate crops with little water
Answer:
The correct answer is option C. "Most cells in the human body are in G0".
Explanation:
G0 is the phase of the cell cycle at which the cells are in a quiescent state. Basically, this is considered as a "normal" state for the cells, because at this point the cells are neither dividing nor preparing to divide. Most cells in the human body are in G0, because most cells in the body are fully differentiated, particularly adult neuronal cells.