A group of neurobiologists investigated the impact of a novel fungal compound, Toxin-Z, on acetylcholinesterase () activity. Because Toxin-Z is hydrophobic, it was dissolved in a dimethyl sulfoxide () solvent. Four reaction mixtures were prepared under constant temperature () and ():
- Reaction 1: + substrate + buffer
- Reaction 2: + substrate + buffer +
- Reaction 3: + substrate + buffer + + Toxin-Z
- Reaction 4: Substrate + buffer (no )
Match each reaction mixture to its specific experimental role or control designation.
- Reaction 1Uninhibited baseline condition to establish normal enzyme reaction rates in standard buffer
- Reaction 2Vehicle control to ensure the solvent itself does not alter enzyme activity
- Reaction 3Experimental treatment group to test the direct influence of Toxin-Z on enzyme activity
- Reaction 4Negative control to confirm that substrate degradation does not occur without the enzyme present
Cevap
Reaction 1 matches the uninhibited baseline condition; Reaction 2 matches the vehicle control; Reaction 3 matches the experimental treatment group; Reaction 4 matches the negative control for non-enzymatic reaction.
Each reaction mixture isolates a distinct variable: Reaction 1 sets the baseline without solvent, Reaction 2 controls for the DMSO carrier solvent, Reaction 3 tests Toxin-Z, and Reaction 4 controls for spontaneous substrate breakdown without enzyme.
Adım Adım Çözüm
Anahtar Kavram
Identifying control groups (baseline, vehicle, and negative controls) to isolate specific variables in biological assays.