Multiple choice

Match the columns:

 
Column – I Column – II
P. Emerson and Arnold 1. Oxygen comes from water in photosynthesis
Q. Ruben and Kamen 2. Chloroplasts as the site of photosynthesis
R. Arnon 3. Mechanism of phosphorylation in chloroplast
S. Engelmann 4. Existence of light and dark reaction in photosynthesis

  1. P - 2, Q - 1, R - 3, S - 4

  2. P - 2, Q - 3, R - 4, S - 1

  3. P - 3, Q - 1, R - 4, S - 2

  4. P - 3, Q - 4, R - 2, S - 1

  5. P - 4, Q - 2, R - 3, S - 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This option is correct because all are correctly matched. In 1932, Emerson and Arnold proved the existence of light and dark reaction in photosynthesis. In 1939, Samuel Ruben and Martin Kamen used radioactive isotopes to determine that the oxygen liberated in photosynthesis came from the water. In 1954, Arnon discovered the mechanism of phosphorylation in chloroplasts. In 1881, Theodore Engelmann identified chloroplasts as the site of photosynthesis.  

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