Question

Dark reaction of photosynthesis is called as
A. Aphotic action
B. Black action
C. Blackmans reaction
D. None of the above

Answer 1

Hint: Photosynthesis is the process which uses the sunlight energy for chemical reactions and produces sugars. Oxygenic photosynthesis is performed by all plants, some bacteria, and algae. In Oxygenic photosynthesis water is split into oxygen and hydrogen, this helps to power up the process and at last, oxygen is released as a waste product.

Complete answer:
There are two types of reactions in photosynthesis. The first type of reaction is Light reaction and the other type of reaction is Dark reaction.
In light reactions, the reaction is completely dependent on sunlight. In the grana of the chloroplast, the light reaction occurs. In the light reaction, Due to light NADPH and the assimilatory power ATP will be formed.
In a dark reaction, the reaction is completely independent of sunlight. In the stroma of the chloroplast, the dark reaction occurs. In the dark reaction, the products NADPH and the assimilatory power ATP formed in the light reaction are used. By using assimilatory power ATP and NADPH, the thermochemical reduction of carbon dioxide to carbohydrates is performed.
In the year 1905, Blackman established a dark reaction for the first time. Therefore it is known as Blackman's reaction.

Hence the correct answer is option C. Dark reaction of photosynthesis is called a Blackmans reaction.

Note: Some chemical reactions convert carbon dioxide and other chemical compounds into glucose. Dark reaction is one the chemical reaction which belongs to that category. Light independent reactions, biosynthetic phase reactions, Calvin cycle, and photosynthetic carbon reduction cycle of photosynthesis are some other chemical reactions that belong to the same category.