Photo AI
The blue dye DCPIP can be used to measure photolysis in chloroplast suspensions - Scottish Highers Biology - Question 17 - 2022
Question 17
The blue dye DCPIP can be used to measure photolysis in chloroplast suspensions. When photolysis occurs DCPIP changes from blue to colourless. In an experiment thre... show full transcript
Worked Solution & Example Answer:The blue dye DCPIP can be used to measure photolysis in chloroplast suspensions - Scottish Highers Biology - Question 17 - 2022
Step 1
Which row in the table shows the results of this experiment?
Answer
To determine the color of DCPIP in each tube after 10 minutes, we need to analyze the conditions:
- Tube P: It has chloroplast suspension exposed to light. Photolysis occurs, meaning DCPIP changes from blue to colourless. Thus, Tube P would show colourless DCPIP.
- Tube Q: It has chloroplast in the dark, where photolysis cannot occur. DCPIP remains blue.
- Tube R: It has no chloroplast suspension, indicating no photolysis can occur. However, since it is exposed to light, it would result in blue DCPIP due to the absence of chloroplast.
Given this analysis, the correct color outcomes for the tubes would be:
- Tube P: colourless
- Tube Q: blue
- Tube R: blue
This corresponds to option C in the table.