When the Concentrations of Reactant Molecules Are Increased, the Rate

question 122

Multiple Choice

When the concentrations of reactant molecules are increased, the rate of reaction increases. The best explanation for this phenomenon is that as the reactant concentration increases,

• A) the average kinetic energy of molecules increases.
• B) the frequency of molecular collisions increases.
• C) the rate constant increases.
• D) the activation energy increases.
• E) the order of reaction increases.

---

Definitions:

Initiator tRNA

The transfer RNA that recognizes the start codon on mRNA and initiates protein synthesis by bringing the first amino acid to the ribosome.

Amino Acid

Organic compounds that combine to form proteins, serving as the building blocks of life.

Leucine

an essential amino acid used in the biosynthesis of proteins, important for muscle repair and growth.

Poly-A Tail

The string of adenine nucleotides added to the 3' end of a newly synthesized pre-mRNA molecule, playing a role in mRNA stability and translation.