Question

Choose the incorrect statement from the following.

• A. T. W. Engelmann based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide to carbohydrates.
• B. Julius von Sachs found that the green parts in plants is where glucose is made, and that the glucose is usually stored as starch.
• C. Joseph Priestley performed a series of experiments that revealed the essential role of air in the growth of green plants.
• D. Ingenhousz in an experiment with an aquatic plant showed that
  in bright sunlight, small bubbles were formed around the green parts while in the dark they did not.

Answer 1

The correct option is A T. W. Engelmann based on his studies of purple and green bacteria, demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide to carbohydrates.

Cornelius van Niel (1897-1985), based on his studies of purple and green bacteria, demonstrated that photosynthesis is a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide to carbohydrates.

T.W Engelmann (1843 – 1909) split light into its spectral components using a prism. He then illuminated a green alga, Cladophora, placed in a suspension of aerobic bacteria. The bacteria were used to detect the sites of Oxygen evolution. He observed that the bacteria accumulated mainly in the region
of blue and red light of the split spectrum. He, thus, was the first one to describe the action spectrum of photosynthesis.