Question

1. Can you name the two organelles we have studied that
contain their own genetic material?
2. If the organisation of a cell is
destroyed due to some physical
or chemical influence, what will
happen?
3. Why are lysosomes known as
suicide bags?
4. Where are proteins synthesised inside the cell?

small answer questions

grade 9
fundamental unit of life​

Answer 1

1. Mitochondria and Chloroplast are two organelles which contains their own genetic material.

2.If the organization of the cell is destroyed due to some physical or chemical influence, the cell would become a permanent tissue.

3. Lysosomes are known as the sucide bags of the cell because when the cell gets damaged during the metabolic activity, the lysosomes may burst and digests their own cell.

4.Protiens are synthesized in the cell in rER or Rough Endoplasmic Reticulum.

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Answer 2

Explanation:

1. Mitochondria and plastids are the two organelles that contain their own genetic material. Both these organelles have their own DNA and ribosomes.
2. If the organisation of a cell is destroyed due to some physical or chemical influence then the cell will not able to perform the basic functions like respiration, excretion, nutrition etc. This may stop all the life activities and may result in it's death.
3. Lysosomes are cellular organelles which produce digestive enzymes that play a role in the breakdown of waste materials, cellular debris as well as foreign particles. In case of any dysregulation in cellular metabolism, these lysozymes release their digestive enzymes which digest or kills its own cell. Hence, lysosomes are known as 'suicide bags' of a cell.
4. Proteins are synthesised by ribosomes which are RNA protein complexes. Ribosomes translate the mRNA into proteins.
5. In prokaryotic cells, proteins are synthesised in the cytosol because membrane bound cell organelles are absent and ribosomes are present in the cytosol.
6. In eukaryotic cells, proteins are synthesised in the rough endoplasmic reticulum or RER as ribosomes are present on the membrane of RER. Proteins are synthesised by the ribosomes and enter the cisternae of endoplasmic reticulum through channels present in the membrane.