**Ncert Diagram Based Questions: Part 4**

In this article, we will discuss some diagram-based questions that are commonly found in NCERT textbooks. These questions require a thorough understanding of the given diagram and the concepts associated with it. Let's dive into the details!

**Question 1:**
Refer to the given diagram and answer the following questions.


a) Identify the parts labeled A, B, C, and D.
b) What is the function of part A?
c) Which process is represented by part B?
d) Explain the role of part C in the given diagram.
e) What is the significance of part D?

**Answer:**
a) Parts labeled A, B, C, and D can be identified as follows:
- A: Cell membrane
- B: Nucleus
- C: Endoplasmic reticulum
- D: Golgi apparatus

b) Part A, the cell membrane, serves as a protective barrier that separates the cell's internal environment from the external surroundings. It regulates the entry and exit of substances, maintaining the cell's integrity.

c) Part B, the nucleus, represents the control center of the cell. It contains the genetic material in the form of DNA and regulates cellular activities such as growth, metabolism, and reproduction.

d) Part C, the endoplasmic reticulum (ER), plays a crucial role in protein synthesis and lipid metabolism. It consists of a network of tubules and vesicles, involved in the transportation of proteins within the cell.

e) Part D, the Golgi apparatus, is responsible for processing, packaging, and sorting proteins and lipids synthesized in the cell. It modifies these molecules and prepares them for transportation to their final destinations within or outside the cell.

**Question 2:**
Study the given diagram and answer the following questions.


a) Identify the components labeled A and B.
b) What is the function of component A?
c) Explain the role of component B in the given diagram.

**Answer:**
a) The components labeled A and B can be identified as follows:
- A: Chloroplast
- B: Thylakoid membrane

b) Component A, the chloroplast, is a specialized organelle found in plant cells. It is responsible for photosynthesis, the process by which plants convert sunlight into chemical energy in the form of glucose.

c) Component B, the thylakoid membrane, plays a crucial role in the process of photosynthesis. It contains chlorophyll and other pigments that capture light energy. This energy is then used to convert water and carbon dioxide into glucose and oxygen during the light-dependent reactions of photosynthesis.

These diagram-based questions require a thorough understanding of the given diagrams and their associated concepts. By carefully analyzing the labeled parts and their functions, you can effectively answer such questions. Remember to refer to your NCERT textbooks for accurate information and practice regularly to improve your understanding of diagrams in biology.