Q4 of 70 Page 67

What happens in photolysis? …………………….

In the process of photolysis the water molecule gets split into hydrogen ions and oxygen in presence of light energy.

2H2O → 4H+ + 4e- + O2


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2

Which single substance in the above equation is repeated in raw material as well as reproduced as the end products? ……………………………….

 3

What is the source of oxygen released in photosynthesis – CO2 or H2O ? ……………………………….

 5

The dark reaction involves utilization of CO2 in producing C6H12O6 (glucose). Why is this phase called dark reaction?

 6

Glucose produced during photosynthesis is soon polymerised into starch. What does polymerisation mean? ……………….