Protein folding is the physical process by which a protein chain acquires its native 3-dimensional structure, a confirmation that is usually biologically functional, in an expeditious and reproducible manner. It is the physical process by which a polypeptide folds into its characteristic and functional three-dimensional structure from random coil. Each protein exists as an unfolded polypeptide or random coil when translated from a sequence of mRNA to a linear chain of amino acids. This polypeptide lacks any stable (long-lasting) three-dimensional structure (the left-hand side of the first figure). As the polypeptide chain is being synthesized by the ribosome, the linear chain begins to fold into its three-dimensional structure. Folding begins to occur even during translation of the polypeptide chain. Amino acids interact with each other to produce a well-defined three-dimensional structure, the folded protein (the right-hand side of the figure), known as the native state<span>.</span>
Chemical sedimentary rocks form because of the precipitation of crystals from aqueous (water) solutions and from chemical residues. When crystals grow out of a solution (for instance, halite, or table salt, out of water) they can only use the space they have available, often interfering with each other's growth pattern. B
The answer should be <span>An error during the S phase is corrected during the G2 phase.</span>
They're converted to 'Acetyl- CoA'
Hope this helps
The correct answer is 3 billion years old as per the banded iron sample obtained from Canada
