Questions: At the optimal growth conditions of an organism, its are most functional, and its are intact. DNA; protein Protein; DNA All of these are wrong Proteins; membranes

The answer is the last one: Proteins; membranes.

Explanation for each option:

1. DNA; protein: This option suggests that DNA is most functional and protein is intact at optimal growth conditions. While DNA is crucial for the genetic information of an organism, it is not typically described as being "most functional" in the context of growth conditions. Proteins, rather than DNA, are the molecules that perform most of the functional tasks in a cell.

2. Protein; DNA: This option suggests that proteins are most functional and DNA is intact. While proteins are indeed functional, the integrity of DNA is not typically the primary concern in the context of optimal growth conditions. DNA integrity is more related to stability and replication rather than growth conditions.

3. All of these are wrong: This option implies that none of the given statements are correct. However, one of the options does accurately describe the conditions.

4. Proteins; membranes: This option correctly identifies that at optimal growth conditions, proteins are most functional, as they are responsible for catalyzing reactions, signaling, and structural functions. Additionally, membranes are intact, which is crucial for maintaining cellular integrity and function, as they control the passage of substances in and out of the cell.

In summary, at optimal growth conditions, proteins are most functional, and membranes are intact, making the last option the correct choice.