Question

Match the following scientists with their discoveries. Scientist Discovery

A.	Engelmann	I.	Chemical composition of chlorophyll and carotenoids
B.	Willstatter and Stoll	II.	$C_4$ cycle
C.	Hatch and Slack	III.	In the presence of light, isolated chloroplast from green leaves reduce a variety of compounds
D.	Robert Hill	IV.	Green substances is located within special bodies in plants

• A. A-IV, B-I, C-II, D-III
  
• B. A-I, B-II, C-III, D-IV
• C. A-IV, B-III, C-II, D-I
• D. A-I, B-IV, C-III, D-II

Answer 1

The correct option is A A-IV, B-I, C-II, D-III


Theodor W. Engelmann projected a spectrum of light onto filamentous chloroplast of green algae and observed that oxygen seeking bacteria that were introduced into the system were concentrated in the red and blue region.

Pelletier and Caventou in 1818 coined the term "chlorophyll" but the chemical structure describing it as magnesium complexes was obtained by Willstatter and Stoll in 1913.

Hatch and Slack in Australia in 1966 discovered Hatch-Slack pathway or $C_4$ cycle.

Robert Hill in 1937 discovered that isolated chloroplast from green leaves can not produce $O_2$ when illuminated unless a suitable electron acceptor is added to the suspension. The light reaction is also known as the Hill reaction.

Later S. Ochoa showed that ${\mathrm{NADP}}^{+}$ is the biological electron acceptor in the chloroplast.