AUG initiation codon occurs over a. 5'end of mRNA b. 3' end of mRNA c. Long arem of tRNA d. short arm of tRNA

Sure, I can convert the solutions into step by step solutions. Here's an example: Problem: Simplify the expression $\frac{3x^2{y}^3}{6xy}$. Solution: Step 1: Cancel out the common factors in the numerator and denominator. $\frac{3x^2{y}^3}{6xy}=\frac{3\cdot x\cdot x\cdot y\cdot y\cdot y}{2\cdot 3\cdot x\cdot y}$ Step 2: Simplify the remaining factors by canceling out the common factors. $\frac{3\cdot x\cdot x\cdot y\cdot y\cdot y}{2\cdot 3\cdot x\cdot y}=\frac{x\cdot y\cdot y}{2}$ Step 3: Rewrite the simplified expression in its simplest form. $\frac{x\cdot y\cdot y}{2}=\frac{x{y}^2}{2}$ Therefore, the simplified expression for $\frac{3x^2{y}^3}{6xy}$ is $\frac{x{y}^2}{2}$.