Question

Write differences between (AS1)
a)autotrophic nutrition - heterotrophic nutrition-
c) Light reaction - dark reaction​

Answer 1

Autotrophic nutrition -

1. Organism prepares its own food.

2. Food is prepared from carbon dioxide and water in presence of sunlight.

Heterotrophic nutrition -

1. Organism depends on other organisms for food.

2. Food cannot be prepared from carbon dioxide or water.

______________________________________

Light Reaction-

1. It takes place only in the presence of light.

2. It is a photochemical phase.

3. It takes place in the grana of the chloroplast.

4. NADP utilizes H+ ions to form NADPH.

5. The end products are ATP and NADPH.

6. The water molecules split into hydrogen and oxygen.

7. Photolysis occurs in PS-II.

Dark Reaction-

1 . It can take place in the presence or absence of sunlight.

2. It is a biochemical phase.

3. It takes place in the stroma of the chloroplast.

4. The hydrogen of NADPH combines with CO2.

5. Glucose is the end product. ATP and NADPH help in the formation of glucose.

6. Glucose is produced. Co2 is utilized in the dark reaction.

7. Photolysis does not occur.

I hope this answer will help you!