Consider the following statements: 1. Eukaryotic cells are cells without a nucleus and are found in single-celled organisms. 2. Prokaryotic cells are cells that contain a nucleus and they are found mainly in multicellular organisms. Which of the statements given above is/are correct?
Consider the following statements: 1. Eukaryotic cells are cells without a nucleus and are found in single-celled organisms. 2. Prokaryotic cells are cells that contain a nucleus and they are found mainly in multicellular organisms. Which of the statements given above is/are correct? Correct Answer Neither 1 nor 2
The correct answer is Neither 1 nor 2.
Key Points
- Prokaryotic cells are cells without a nucleus.
- Prokaryotic cells are found in single-celled organisms, such as bacteria. Hence, statement 2 is incorrect.
- Organisms with prokaryotic cells are called prokaryotes.
- They were the first type of organisms to evolve and are still the most common organisms today.
- Organisms that lack a membrane-bound nucleus are called prokaryotes.
- A prokaryotic cell does not contain a well-defined nucleus.
- The DNA in prokaryotic cells is in the cytoplasm rather than enclosed within a nuclear membrane.
- The genetic material is present on a single chromosome.
- All prokaryotes have a cell wall surrounding the cell membrane except in mycoplasma.
- The nucleolus is absent in prokaryotic cells.
- The fluid matrix filling the prokaryotic cell is the cytoplasm.
- Membrane-bound cell organelles are absent in prokaryotes.
- In prokaryotes, cell division takes place by fission or budding.
- Blue-green algae, bacteria, and mycoplasma are examples of prokaryotes.
- Eukaryotic cells are cells that contain a nucleus.
- Eukaryotic cells are usually larger than prokaryotic cells, and they are found mainly in multicellular organisms. Hence, statement 1 is incorrect.
- Eukaryotic cells also contain other organelles besides the nucleus.
- Eukaryotic cells have a nucleus enclosed within the nuclear membrane and form large and complex organisms.
- They can maintain different environments in a single cell that allows them to carry out various metabolic reactions.
- This helps them grow many times larger than the prokaryotic cells.
- Since eukaryotic cells typically have multiple linear chromosomes, capped with telomeres, eukaryotic DNA replication and cell division (mitosis and meiosis) are a bit more complicated.
- Protozoa, fungi, plants, and animals all have eukaryotic cells.
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Feb 20, 2025