Which of the Following Is NOT an Example of a Physical

question 77

Multiple Choice

Which of the following is NOT an example of a physical change?

• A) freezing water to make ice
• B) ice cream melting in a bowl
• C) boiling water
• D) water condensing on the surface of a glass of ice tea
• E) onions browning as they are cooked

---

Definitions:

mRNA Synthesis

The process of synthesizing messenger RNA (mRNA) from a DNA template during gene expression, allowing for protein production.

Structural Gene

A gene that codes for any RNA or protein product other than a regulatory factor.

Transcription Factors

Proteins that bind to specific DNA sequences, thereby controlling the transfer (transcription) of genetic information from DNA to messenger RNA.

Leucine Zipper Proteins

A type of protein that contains a specific motif which allows it to dimerize and bind DNA, playing key roles in regulating gene expression.