Kepler’s third law of planetary motion states that the square of a planet's orbital period is proportional to the cube of the average distance between the planet and the sun.

True.

Explanation:

The laws created by Keepler in the field of astronomy try to explain how the planetary movement of the solar system occurs to the sun's stalk. It also explains how the movement of satellites around the planets occurs. In other words, these laws wish to explain the orbits of planets and satellites.

There are three laws in all, in the third of them, the so-called Law of Periods, Kepler states that the square of the period of revolution of the planets (also known as the orbital period) is directly proportional to the cube of the average rays of the orbits of these planets. This is to say that the orbital period of a planet is proportional to the cube of the average distance between the planet and the sun.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.