Class 11 Biology - Chapter Cell: The Unit of Life NCERT Solutions | Justify the statement, “Mitochondr
Justify the statement, “Mitochondria are power houses of the cell”
Each mitochondrion is a double membrane bound structure with the outer membrane and the inner membrane. The mitochondria are involved in releasing energy from food. This process is known as cellular respiration. This process produces cellular energy in the form of ATP (high grade fuel of the cell). ATP is used to bring about energy requiring activities in the cell. It is the reason that mitochondria are often referred to as the Powerhouses of the cell.
More Questions From Class 11 Biology - Chapter Cell: The Unit of Life
- Q:-
Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles? State their functions and draw labelled diagrams of both.
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Multicellular organisms have division of labour. Explain.
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What is a centromere? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.
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Cell is the basic unit of life. Discuss in brief.
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What is a mesosome in a prokaryotic cell? Mention the functions that it performs.
- Q:-
Which of the following is correct:
(a) Cells of all living organisms have a nucleus.
(b) Both animal and plant cells have a well defined cell wall.
(c) In prokaryotes, there are no membrane bound organelles.
(d) Cells are formed de novo from abiotic materials. - Q:-
Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
- Q:-
Describe the structure of the following with the help of labelled diagrams.
(i) Nucleus
(ii) Centrosome - Q:-
What are nuclear pores? State their function.
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How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?
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