A gene directs the synthesis of a protein<span> by a two-step process. First, the instructions in the </span>gene<span> in the DNA are copied into a messenger RNA (mRNA) molecule. The sequence of nucleotides in the </span>gene<span> determines the sequence of nucleotides in the mRNA. This step is called transcription.</span>
The object's mass. Weight would be how gravity affected it, size is how large it is, density is how tightly the molecules are to each other. Mass is how much matter is in the object.
