< b > RESPONSE < / b > < br > < br > Vulcan blood is presumed to be green in color , the explanation for this ( first definitely advanced in the installment  Obsession ,  from the original program ) being that the oxiferous ( oxygen-carrying ) protein < i > < b > hemoglobin , < / b > < / i > in Vulcan blood cells , is chemically based on the ...
View my complete profile. A secondary standard is a substance which may be used for standardizations, and whose content of the active substance has been found by comparison against a primary standard.iew my complete profile. A secondary standard is a substance which may be used for standardizations, and whose content of the active substance has been found by comparison against a primary standard.
Secondary structure. Definition. noun. A structure of a biological molecule characterized by the local folding within the biopolymer as a result of hydrogen bonding (within the biopolymer). Supplement. In proteins, there are four recognized levels of protein structure: primary structure, secondary structure, tertiary structure, and quaternary structure. A secondary structure of a protein pertains to the folding of a polypeptide chain, resulting in an alpha helix, beta sheet or a random coil structure. Another example of a secondary structure is that of a nucleic acid such as the clover leaf structure of tRNA. See also: protein structure.