Emerson's enhancement effect and Red drop have been instrumental in the discovery of:

1. Photophosphorylation and non-cyclic electron transport

2. Two photosystems operating simultaneously

3. Photophosphorylation and cyclic electron transport

4. Oxidative phosphorylation

One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:

In Hatch and Slack pathway, the primary CO₂ acceptor is -

1. Oxaloacetic acid

2. Phosphoglyceric acid

3. Phosphoenol pyruvate

4. Rubisco

First action spectrum of photosynthesis was described by:
1. Joseph Priestley
2. T. W. Engelmann
3. Robin Hill
4. C. B. van Neil

During oxygenic photosynthesis in chloroplasts, the liberated oxygen comes from ______ and the reactions leading to its liberation are associated with ______.
1. CO₂, PS II
2. H₂O, PSII
3. CO₂, Calvin cycle
4. H₂O, PS I

Where are the carriers of the electrons located in a chloroplast?

Calvin cycle consumes more ATP than NADPH. What is the source of this extra ATP needed?
1. PS I
2. PS II
3. Cyclic electron flow
4. Linear electron flow

An increased leakiness of the thylakoid membrane will directly effect:

The catalytic knobs of ATP synthetase in a thylakoid membrane is located:

Carbon dioxide provided to a C4 plant is radioactively labeled. As the photosynthesis in this plant gets underway, radioactivity if expected to occur first in:
1. Oxaloacetic acid
2. PEP
3. Malic acid
4. RuBP