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?

The correct option is 2 and 3 only. Explanation Julius von Sachs was a prominent German botanist who, in 1854, provided crucial evidence regarding the production and storage of food in plants. His work established the fundamental relationship between chloroplasts, light, and carbohydrate synthesis. Statement-wise Analysis - Statement 1 is Incorrect. Sachs provided evidence that glucose is produced when plants grow and that this glucose is usually stored as starch, not proteins. The presence of starch is a key indicator of photosynthesis. - Statement 2 is Correct. His studies demonstrated that the green substance in plants (chlorophyll) is located in distinct special bodies (later identified as chloroplasts) within plant cells, rather than being diffused throughout the cell. - Statement 3 is Correct. Sachs explicitly found that the green parts in plants are the specific sites where glucose is made. Consequently, non-green parts of the plant are not involved in the primary synthesis of carbohydrates, although they may store them. Key Takeaway Julius von Sachs proved that photosynthesis takes place in the chloroplasts (green parts) of plant cells and results in the production of glucose, which is stored as starch.

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

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With reference to Julius von Sachs’ contributions, consider the following statements:

Photosynthetic products are stored primarily as proteins.
Chlorophyll is confined to distinct cellular bodies.
Non-green parts are not involved in carbohydrate synthesis.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A2 only
B2 and 3 only
C1, 2 and 3
D1 and 2 only

Did you get this right?

Solution

The correct option is 2 and 3 only.

Explanation

Julius von Sachs was a prominent German botanist who, in 1854, provided crucial evidence regarding the production and storage of food in plants. His work established the fundamental relationship between chloroplasts, light, and carbohydrate synthesis.

Statement-wise Analysis

Statement 1 is Incorrect. Sachs provided evidence that glucose is produced when plants grow and that this glucose is usually stored as starch, not proteins. The presence of starch is a key indicator of photosynthesis.
Statement 2 is Correct. His studies demonstrated that the green substance in plants (chlorophyll) is located in distinct special bodies (later identified as chloroplasts) within plant cells, rather than being diffused throughout the cell.
Statement 3 is Correct. Sachs explicitly found that the green parts in plants are the specific sites where glucose is made. Consequently, non-green parts of the plant are not involved in the primary synthesis of carbohydrates, although they may store them.

Key Takeaway

Julius von Sachs proved that photosynthesis takes place in the chloroplasts (green parts) of plant cells and results in the production of glucose, which is stored as starch.

Your note

More from 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?

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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.

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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?

hard

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?

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Which one of the following is the chief pigment associated with the reaction centre in photosynthesis in higher plants?

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Keep practising Chapter 1: Photosynthesis in Higher Plants

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The correct option is 2 and 3 only.

Explanation

Statement-wise Analysis

Statement 1 is Incorrect. Sachs provided evidence that glucose is produced when plants grow and that this glucose is usually stored as starch, not proteins. The presence of starch is a key indicator of photosynthesis.
Statement 2 is Correct. His studies demonstrated that the green substance in plants (chlorophyll) is located in distinct special bodies (later identified as chloroplasts) within plant cells, rather than being diffused throughout the cell.
Statement 3 is Correct. Sachs explicitly found that the green parts in plants are the specific sites where glucose is made. Consequently, non-green parts of the plant are not involved in the primary synthesis of carbohydrates, although they may store them.

Key Takeaway

Julius von Sachs proved that photosynthesis takes place in the chloroplasts (green parts) of plant cells and results in the production of glucose, which is stored as starch.