Which of the following proteins is the most abundant on Earth?

Select the correct statement.

The two pigment system theory of photosynthesis was proposed by

For the process of photosynthesis,all except one of the following items are essential. Point out the exception.

For the synthesis of one molecule of hexose,how many additional molecules of $ATP$ are required in $C_3$ and $C_4$ pathways,respectively,besides the $12$ molecules of $NADPH_2$?

Photosynthesis without the evolution of oxygen is a characteristic of which of the following?