NCERT Class 11 Science — Chapter 1: Photosynthesis in Higher Plants

Consider the following statements about autotrophic nutrition: 1. It is characteristic of green plants and some bacteria. 2. It involves conversion of chemical energy into light energy. 3. Heterotrophs ultimately depend on it. Which of the statements given above are correct?

Assertion (A): In aquatic plants, bubbles of oxygen are formed around the green parts during active photosynthesis. Reason (R): Photosynthesis requires light energy to split water molecules, releasing oxygen.

With reference to Julius von Sachs’ contributions, consider the following statements: 1. Photosynthetic products are stored primarily as proteins. 2. Chlorophyll is confined to distinct cellular bodies. 3. Non-green parts are not involved in carbohydrate synthesis. Which of the statements given above is/are correct?

Consider the following statements about oxygen evolution in photosynthesis: 1. It is always replaced by sulphur production in all autotrophs. 2. It arises from the oxidation of water. 3. It is derived from carbon dioxide in higher plants. Which of the statements given above is/are correct?

With reference to the role of photosynthesis in the biosphere, consider the following statements: 1. It is responsible for releasing carbon dioxide into the atmosphere. 2. It is the primary source of food for all living forms. 3. It is the only pathway of ATP generation in plants. Which of the statements given above is/are correct?