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Introduction to cells - Class 9 Biology - Science Video Lecture | CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute

6 videos|3 docs

FAQs on Introduction to cells - Class 9 Biology - Science Video Lecture - CBSE Class 9 Biology(CELLS)-Videos & Documents by Let's tute

1. What is a cell?
Ans. A cell is the basic structural and functional unit of all living organisms. It is the smallest unit of life that can carry out all the necessary functions for survival.
2. What are the different types of cells?
Ans. There are two main types of cells: prokaryotic cells and eukaryotic cells. Prokaryotic cells, such as bacteria, do not have a nucleus or membrane-bound organelles. Eukaryotic cells, found in plants, animals, and fungi, have a nucleus and membrane-bound organelles.
3. What is the function of a cell membrane?
Ans. The cell membrane, also known as the plasma membrane, acts as a barrier that separates the cell from its external environment. It controls the movement of substances in and out of the cell, allowing nutrients to enter and waste products to exit.
4. How do cells obtain energy?
Ans. Cells obtain energy through a process called cellular respiration. In this process, cells break down glucose and other molecules to release energy in the form of ATP (adenosine triphosphate). This energy is then used by the cell for various metabolic activities.
5. What is the role of the nucleus in a cell?
Ans. The nucleus is often referred to as the control center of the cell. It contains the cell's genetic material, DNA, which carries the instructions for the cell's growth, development, and reproduction. The nucleus also regulates the synthesis of proteins and controls the activities of the cell.
6 videos|3 docs
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