Which of the following correctly describes the primary and tertiary structures of a protein?
A. The primary structure is the amino acid chain; the tertiary
structure is the protein's shape.
B. The primary structure is the amino acid chain; the tertiary
structure is the mRNA sequence.
C. The primary structure is the mRNA sequence; the tertiary structure
is the amino acid chain.
D. The primary structure is the protein's shape; the tertiary structure
is the amino acid chain.

- decrease the number of plants and animals living in the water.

the answer would be b i believe

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.