Question
Download Solution PDFWhich among the following is not a prokaryote?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
- Living organisms can be divided into two groups based on their cell structure i.e. prokaryotes and eukaryotes.
- The cells of these organisms are respectively called prokaryotic cells and eukaryotic cells.
Explanation:
Some of the major differences between the two types of cells are as follows:
| PROKARYOTIC CELLS | EUKARYOTIC CELLS |
|---|---|
| These cells lack a well-defined nucleus | These cells have a nuclear membrane-bound nucleus |
| Cells lack membrane-bound cell organelles | Cells have membrane-bound organelles like mitochondria, Golgi complex, ribosomes, etc. |
| Genetic material consists of a single chromosome | Genetic material consists of more than one chromosome |
| DNA is not associated with histone proteins | DNA is associated with histone proteins |
| Extrachromosomal self-replicating DNA molecules called plasmids are found in these cells | Plasmids are absent |
| Ribosomes are of 70S type | Ribosomes are of 80S type |
| Cell division is amitotic | Cell division is either by mitosis or by meiosis |
|
Eg.: Escherichia coli, Streptococcus pneumonia, Cyanobacteria |
Eg.: Protists, fungi, plants, and animals |
Option 1: Saccharomyces - CORRECT
- Saccharomyces is a genus belonging to Kingdom Fungi.
- Saccharomyces are unicellular eukaryotic organisms.
- Golgi complex, mitochondria, vacuoles, and endoplasmic reticulum are some of the cell organelles found in Saccharomyces.
Option 2: Mycobacterium - INCORRECT
- Mycobacterium is a gram-positive rod-shaped bacteria.
- They belong to Kingdom Monera
- They are unicellular prokaryotic organisms. They lack any cell organelles and a well-defined nucleus.
Option 3: Oscillatoria - INCORRECT
- Oscillatoria is a filamentous cyanobacterium found in freshwater environments.
- They are unicellular prokaryotic organisms belonging to Kingdom Monera.
Option 4: Nostoc - INCORRECT
- Nostoc is a genus of cyanobacteria
- They are unicellular prokaryotic organisms belonging to Kingdom Monera.
So the correct answer is option 1.
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