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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.
Q. Select the Prokaryotic cell
- a)Amoeba
- b)Bacteria
- c)Paramecium
- d)Hydra
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Direction: All living Organisms are made up of cells and these cells ...
Bacteria do not have a true nucleus or well developed nucleus. So, it is a Prokaryotic cell.
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Most Upvoted Answer
Direction: All living Organisms are made up of cells and these cells ...
The correct answer is option 'B' - Bacteria.
Explanation:
Prokaryotic cells are a type of cell that lacks a membrane-bound nucleus and other membrane-bound organelles. They are typically found in single-celled organisms such as bacteria. Let's explore why the other options are not correct:
a) Amoeba: Amoeba is a unicellular organism, but it is classified as a eukaryote, not a prokaryote. Eukaryotic cells have a membrane-bound nucleus and other membrane-bound organelles.
c) Paramecium: Paramecium is also a unicellular organism, but it is a eukaryote, not a prokaryote.
d) Hydra: Hydra is a multicellular organism, and its cells are eukaryotic, not prokaryotic.
Now, let's discuss why bacteria are prokaryotic cells and the characteristics that support this answer:
1. Lack of a membrane-bound nucleus: Prokaryotic cells, including bacteria, do not have a true nucleus. Instead, their genetic material, which is a single circular DNA molecule, floats freely in the cytoplasm.
2. Lack of membrane-bound organelles: Prokaryotic cells do not have membrane-bound organelles such as mitochondria, endoplasmic reticulum, or Golgi apparatus. They have ribosomes for protein synthesis, but these ribosomes are smaller compared to those found in eukaryotic cells.
3. Cell wall: Bacteria have a cell wall made of peptidoglycan, a unique feature not found in eukaryotic cells.
4. Flagella: Many bacteria have flagella, which are whip-like structures that enable them to move. Flagella in prokaryotic cells differ in structure from those found in eukaryotic cells.
5. Size: Prokaryotic cells, including bacteria, are generally smaller in size compared to eukaryotic cells.
These characteristics clearly indicate that bacteria are prokaryotic cells. It's important to note that prokaryotic cells are simpler in structure compared to eukaryotic cells, which have a more complex organization with specialized organelles.
Explanation:
Prokaryotic cells are a type of cell that lacks a membrane-bound nucleus and other membrane-bound organelles. They are typically found in single-celled organisms such as bacteria. Let's explore why the other options are not correct:
a) Amoeba: Amoeba is a unicellular organism, but it is classified as a eukaryote, not a prokaryote. Eukaryotic cells have a membrane-bound nucleus and other membrane-bound organelles.
c) Paramecium: Paramecium is also a unicellular organism, but it is a eukaryote, not a prokaryote.
d) Hydra: Hydra is a multicellular organism, and its cells are eukaryotic, not prokaryotic.
Now, let's discuss why bacteria are prokaryotic cells and the characteristics that support this answer:
1. Lack of a membrane-bound nucleus: Prokaryotic cells, including bacteria, do not have a true nucleus. Instead, their genetic material, which is a single circular DNA molecule, floats freely in the cytoplasm.
2. Lack of membrane-bound organelles: Prokaryotic cells do not have membrane-bound organelles such as mitochondria, endoplasmic reticulum, or Golgi apparatus. They have ribosomes for protein synthesis, but these ribosomes are smaller compared to those found in eukaryotic cells.
3. Cell wall: Bacteria have a cell wall made of peptidoglycan, a unique feature not found in eukaryotic cells.
4. Flagella: Many bacteria have flagella, which are whip-like structures that enable them to move. Flagella in prokaryotic cells differ in structure from those found in eukaryotic cells.
5. Size: Prokaryotic cells, including bacteria, are generally smaller in size compared to eukaryotic cells.
These characteristics clearly indicate that bacteria are prokaryotic cells. It's important to note that prokaryotic cells are simpler in structure compared to eukaryotic cells, which have a more complex organization with specialized organelles.
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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. Select the Prokaryotic cella)Amoebab)Bacteriac)Parameciumd)HydraCorrect answer is option 'B'. Can you explain this answer?
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Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. Select the Prokaryotic cella)Amoebab)Bacteriac)Parameciumd)HydraCorrect answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. Select the Prokaryotic cella)Amoebab)Bacteriac)Parameciumd)HydraCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: All living Organisms are made up of cells and these cells perform all the functions essential for the survival of the Organism eg. respiration, digestion, excretion etc. In Unicellular organisms, a single cell carries out all these functions and in multicellular organisms different group of cells carry out different functions.Q. Select the Prokaryotic cella)Amoebab)Bacteriac)Parameciumd)HydraCorrect answer is option 'B'. Can you explain this answer?.
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