Answer:
1: Gene
2: RNA
3: The shape of the protein
Explanation:
A gene is a stretch of DNA that codes for a specific protein. Gene is expressed through transcription and translation. RNA is single stranded nucleic acid and have four nitrogenous bases: Uracil, Adenine, Guanine and Cytosine. RNA do not have thymine base. The sequence of the amino acids affects the shape of the protein by affecting its secondary and tertiary structure.