Nucleus explanation for class 11 and 9

1. NUCLEUS

3. Nuclear
membrane
Nucleoplasm
Chromosomes DNA
Proteins
PARTS OF NUCLEUS

4. Nuclear
membrane
1. Double layered covering.
2. Consists of pores which allow the movement of
particles in and out.

5. Nucleoplasm
1. Cytoplasm of the
nucleus.
2. Presence of
components of the
nucleus.

6. Chromosomes
1. Contains the information for genetic
inheritance from parents to off springs.
2. Composed of DNA and Proteins.
DEOXY RIBO
NUCLEIC ACID

7. Entangled mass of thread
like structures is called as
chromatin.
During the process of cell
division, the chromatin gets
organized as a particular
structure which is called as
Chromosome.
CHROMATIN CHROMOSOME

8. DNA
“DEOXY RIBO NUCLEIC ACID”
1. DNA is a chemical compound which can be
called as a macromolecule.
2. This contains the information necessary for
constructing and organizing the cells.
3. Segments of DNA are called genes.
4. It is a double stranded structure.

9. Proteins
1. Contains histone proteins.
2. DNA coils around these proteins to make a
structure called nucleosome.

10. DNA: DEOXY RIBO NUCLEIC ACID
Friedrich Meischer