Photosynthesis In Higher Plants Question 178
Question: Which of the following radioactive oxygen was used to detect the source of oxygen in photosynthesis
Options:
A) $ O^{12} $
B) $ O^{16} $
C) $ O^{18} $
D) $ O^{15} $
Show Answer
Answer:
Correct Answer: B
Solution:
Ruben ad Kamen used isotopes of oxygen in water, i.e., $ H_2O^{18} $ instead of $ H_2O $ (normal) and noticed that librated oxygen contains $ O^{18} $ of water and not of $ CO_2 $ $ 6CO_2+12H_2O^{18}\underset{Chalorophyll}{\mathop{\xrightarrow{Light}}},C_6H_{12}O_6+6O_2^{18}+6H_2O $
BETA
