Tag: biology
Questions Related to biology
Intracellular compartments are absent in
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Eukaryotic cell
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Meristem
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Parenchyma cell
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Prokaryotic cell
The organelle found in prokaryotic cell is
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Ribosomes
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Lysosomes
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Plastids
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Mitochondria
Prokaryotic cells do not possess membrane bound organelles. It possesses ribosomes which are not bounded by membrane. Ribosomes are necessary for protein synthesis. Hence, option A is correct.
The main difference between plant and animal cell is
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Animal cells lack cell wall.
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Plant cell has no cell wall.
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Animal cell has a rigid cell wall.
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Plant cells lack cell membrane.
- Both animal and plant cells are eukaryotic cells.
- A plant cell differs from an animal cell in being surrounded by a well-developed cell wall.
The cell organelles are found in
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Bacterial cells
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Cyanobacterial cells
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Prokaryotic cells
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Eukaryotic cells
Eukaryotic cells have a 'eu' or advanced nucleus having a well developed nuclear membrane, nucleolus and histone proteins for packaging of chromatin material. Eukaryotic cell also possesses several membrane bound organelles like plastids and mitochondria.
Plant cell differ from animal cell because of
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The presence of cell wall and absence of chlorophyll in plant cell.
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The presence of cell wall and chlorophyll in plant cell.
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The absence of cell wall and presence of chloroplast in animal cell.
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The absence of cell wall and presence of chlorophyll in plant cell.
Presence of a cellulosic cell wall is a characteristic feature of plant cell. The cell wall present in a plant cell is dead at maturity. Animal cells lack cellulosic cell wall. Plant cells have chlorophyll present inside cell organelles called plastids. Chlorophyll captures light energy which is used by plants in photosynthesis. Thus, plants are autotrophic. An animal cell lacks chlorophyll. Hence, animals are heterotrophic.
Transcription and translation occur in the cytoplasm in a/an
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Prokaryotic cell
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Eukaryotic cell
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Unicellular organism only
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None of the above
Transcription is the process of formation of RNA from DNA. Transcription takes place inside the nucleus, where the DNA of a cell is stored. Since eukaryotes have a defined membrane bound nucleus, therefore transcription always takes place inside the nucleus in eukaryotic cells.
Translation, on the other hand is the process of production of proteins from messenger RNA. Production of proteins require ribosomes and ribosomes are found in cytoplasm. Thus, translation always occurs inside cytoplasm, whether it is a prokaryotic or eukaryotic cell.
In prokaryotes, however there is no define membrane bound nucleus. The DNA or the genetic material of prokaryotes lie inside cytoplasm only. Therefore, prokaryotic cells are the only cells where transcription and translation both occurs inside cytoplasm.
Hence, the correct option 'Prokaryotic cell'.
Which of these best distinguishes a prokaryotic cell from a eukaryotic cell?
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Prokaryotic cells have a cell wall, but eukaryotic cells never do
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Prokaryotic cells have flagella, but eukaryotic cells do not
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Prokaryotic cells do not have a membrane-bounded nucleus, but eukaryotic cells do have such nucleus
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Prokaryotic cells have ribosomes but eukaryotic cells do not have ribosomes
The basic difference between eukaryotes and prokaryotes is the presence and absence of a nuclear membrane. The eukaryotic cells are considered true cells because they possess a nuclear membrane and prokaryotes are considered false cells as they lack it.
So, the correct answer is 'Prokaryotic cells do not have a membrane-bounded nucleus, but eukaryotic cells do have such nucleus'.
Give one key difference between eukaryotic cell and prokaryotic cell.
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Eukaryotes cells have a membrane-bound nucleus and prokaryote cell lacks a membrane-bound nucleus.
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Eukaryotes cells do not have a membrane-bound nucleus and prokaryote cell have a membrane-bound nucleus.
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Both eukaryotes and prokaryotes cell have membrane bound nucleus.
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Both eukaryotes and prokaryotes cell do not have membrane bound nucleus.
Eukaryotes are organisms whose cells have a nucleus enclosed within membranes. A prokaryote is a unicellular organism that lacks a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle.
Prokaryotes can be distinguished from eukaryotes as they lack
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RNA
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Ribosomes
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Gene discontinuity
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Unique DNA sequences
Which of the following statement is incorrect about cell organelles ?
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Endoplasmic reticulum provides membranes to nuclear envelope after telophase
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Golgi apparatus present in both Prokaryotes as well as Eukaryotes
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Lysosomes acts as an intracellular scavenger by removing old or useless organelles in long-lived cells.
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Mitochondria have their own DNA which can replicate independently
- Golgi apparatus is not present in Prokaryotes, because prokaryotic cells lack a nucleus and membrane-bound structures such as mitochondria, lysosomes, Golgi apparatus. while eukaryotic cells have a nucleus and membrane-bound structures.