NCERT Solutions for Class 11 Biology Chapter 8 Cell: The Unit of Life in Hindi PDF Download
FAQs on NCERT Solutions for Class 11 Biology Chapter 8 - In Hindi
1. What are the two organelles and describe the characteristics of mitochondria?
The two organelles are the mitochondria and the chloroplasts.
The characteristics of the mitochondria are as below.
It has a double membrane structure,
The outer and the inner membrane divide into two compartments: the outer compartment and the inner compartment.
Mitochondria can be said to be semi-autonomous as it has its own DNA.
Aerobic respiration takes place in mitochondria.
2. What are the characteristics of chloroplasts?
The characteristics of chloroplasts are as below.
They are found in plants.
Chloroplasts in the lower plants are in various shapes but in the higher plants, it is in the shape of a disc.
Chloroplasts also have their own DNA.
The pigments in the chloroplasts help in photosynthesis.
Chloroplasts contain flattened sacs called thylakoids.
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3. Explain the multicellular organism and the cell as a basic unit of life?
Multicellular organisms have the division of labour. Cells are together organized to form tissues that make the organ and organ system. The cell carries out the functions on its own hence the division of labour is required so the different functions are carried out which also helps in the higher efficiency and higher survival rate.
All plants and animals are made up of organ systems which are made of organs. Organs are made of tissue and further, the tissues are made of cells. Cells carry out the functions on their own; it is said to be the basic unit of life.
4. What are the functions of the nuclear pores?
The pores which are formed by the fusion of the two membranes that surround the nuclear membrane are called the nuclear pores. The nuclear pores help to retain the shape of the nuclear, it helps to preserve the stability of the genetic material from the respiratory breakdown which occurs in the cytoplasm, it also helps in the movement of RNA and the protein molecules from the nucleus and the cytoplasm and vice versa.
5. Explain the difference between the lysosomes and the endomembrane structure?
The endomembrane helps in the flow of materials from one part to another through vesicles. The components are the plasma membrane, endoplasmic reticulum, lysosomes, Golgi vacuoles and the Golgi apparatus. Lysosomes release the lytic enzymes to digest the cells which are worn out and are known as suicidal bags. Vacuoles help to store food and waste products.