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Nuclei
Flash cards
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Nuclei
Flash cards
Introduction of atomic nucleus
The atomic nucleus consists of two types of elementary particles, viz. protons and 
neutrons. These particles are collectively called nucleons.
Page 3


Nuclei
Flash cards
Introduction of atomic nucleus
The atomic nucleus consists of two types of elementary particles, viz. protons and 
neutrons. These particles are collectively called nucleons.
Composition of Nucleus (continued)
1 All nuclei are composed of two types of particles protons and neutrons.
Page 4


Nuclei
Flash cards
Introduction of atomic nucleus
The atomic nucleus consists of two types of elementary particles, viz. protons and 
neutrons. These particles are collectively called nucleons.
Composition of Nucleus (continued)
1 All nuclei are composed of two types of particles protons and neutrons.
Composition of Nucleus (continued)
2 The only exception is the ordinary hydrogen nucleus which is just a single proton.
Page 5


Nuclei
Flash cards
Introduction of atomic nucleus
The atomic nucleus consists of two types of elementary particles, viz. protons and 
neutrons. These particles are collectively called nucleons.
Composition of Nucleus (continued)
1 All nuclei are composed of two types of particles protons and neutrons.
Composition of Nucleus (continued)
2 The only exception is the ordinary hydrogen nucleus which is just a single proton.
Composition of Nucleus (continued)
3 A proton has a mass of 
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FAQs on Flashcards: Nuclei - Physics Class 12 - NEET

1. What is the function of nuclei in a cell?
Ans. Nuclei are the control centers of the cell that contain genetic material and are responsible for regulating cellular activities such as growth, metabolism, and reproduction.
2. How many nuclei are typically found in a cell?
Ans. Most cells contain a single nucleus, which is referred to as a mononucleated cell. However, some cells, such as muscle cells, may have multiple nuclei, known as multinucleated cells.
3. Can cells survive without nuclei?
Ans. No, cells cannot survive without nuclei. The nucleus contains the DNA, which is essential for the cell's survival and functioning. Without the genetic material and the control mechanisms provided by the nucleus, cells cannot carry out their necessary functions.
4. How does the nucleus contribute to cell division?
Ans. The nucleus plays a crucial role in cell division. It undergoes a process called mitosis, where the genetic material is duplicated and divided equally into two daughter cells. This ensures that each new cell receives a complete set of chromosomes and genetic information.
5. Can the nucleus of a cell be altered or modified?
Ans. Yes, the nucleus of a cell can be altered or modified through genetic engineering techniques. Scientists can introduce or remove specific genes from the nucleus to study their functions or create genetically modified organisms with desired traits. However, such modifications must be carefully regulated and ethically evaluated.
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