Ncert solutions

Ncert solutions

Grade 8

Cell — Structure and Functions | Exercise

Question 3

Q 3) Write short notes on the following.

(a) Cytoplasm

(b) Nucleus of a cell

Solution 3:

(a) Cytoplasm

  • Cytoplasm is a jelly-like substance between the nucleus and the cell membrane.
  • Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm.
  • It helps in exchange and storage of substances among cell organelles.
  • Most of the metabolic reactions also occur inside cytoplasm.

(b) Nucleus of a cell

  • The spherical round body present in the centre of the cell is called nucleus.
  • It is an important component of the living cell.
  • Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane.
  • The nuclear membrane is porous and allows the movement of materials between the cytoplasm and nucleus.
  • The nucleus consists of a spherically shaped dense mass called nucleolus. Nucleus also contains thread-like structures called chromosomes. These carry genes and help in inheritance or transfer of characters from the parents to the offspring.

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subject-cta

Question 3

Q 3) Write short notes on the following.

(a) Cytoplasm

(b) Nucleus of a cell

Solution 3:

(a) Cytoplasm

  • Cytoplasm is a jelly-like substance between the nucleus and the cell membrane.
  • Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm.
  • It helps in exchange and storage of substances among cell organelles.
  • Most of the metabolic reactions also occur inside cytoplasm.

(b) Nucleus of a cell

  • The spherical round body present in the centre of the cell is called nucleus.
  • It is an important component of the living cell.
  • Nucleus is separated from the cytoplasm by a membrane called the nuclear membrane.
  • The nuclear membrane is porous and allows the movement of materials between the cytoplasm and nucleus.
  • The nucleus consists of a spherically shaped dense mass called nucleolus. Nucleus also contains thread-like structures called chromosomes. These carry genes and help in inheritance or transfer of characters from the parents to the offspring.

Still have questions? Our expert teachers can help you out

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subject-cta
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