In which plant did Melvin Calvin experiment using radioactive isotopes to discover the first stable product of the $C_3$ cycle?

The experimental material that has largely been responsible for making rapid advances in research on photosynthesis is

$..............$ provided evidence for the production of glucose when plants grow. Glucose is usually stored as starch.

Who demonstrated that photosynthesis is essentially a light dependent reaction in which hydrogen from a suitable oxidisable compound reduces $CO_2$ to carbohydrates?

In which of the following forms is glucose usually stored in plants?

The significance of light and chlorophyll in photosynthesis was discovered by