Tag: cell and cellular organization
Questions Related to cell and cellular organization
Endoplasmic reticulum is absent in
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Animal cells
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Prokaryotes
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Plant cells
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Protista and fungi
Prokaryotic cells are primitive cells. They do not possess many membrane bound organelles as endoplasmic reticulum, mitochondria, lysosomes etc. Therefore, option B is correct.
Difference between eukaryotes and prokaryotes is in
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Circular ssDNA in prokaryotes
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Histone with prokaryotic DNA
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Operon in eukaryotes
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Membrane bound organelles in eukaryotes
On the basis of the structure of cells, organisms are classified as eukaryote and prokaryote. The main differentiating factor between a eukaryote and prokaryote is that the cell organelles of eukaryotic cells are membrane-bound, while that of others are not.
Hence, the correct answer is D.
The main difference between eukaryotes and prokaryotes is___________
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Eukaryotes have nucleus and prokaryotes have nucleoid.
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Eukaryotes have nucleoid and prokaryotes have nucleus.
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Eukaryotes have cell membrane, prokaryotes do not have cell membrane.
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All of the above.
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.
Which microscope is best to study cell division in functional state?
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EM
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SEM
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Phase contrast microscope
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Simple microscope
Phase contrast microscopy is particularly important in biology. It reveals many cellular structures that are not visible with a simpler bright field microscope. These structures were made visible to earlier microscopists by staining, but this required additional preparation and killed the cells. The phase contrast microscope made it possible for biologists to study living cells and how they proliferate through cell division. So, phase contrast microscope is best to study cell division in functional state compared to EM, SEM and simple microscope.
The figures of cork cells as seen by Robert Hooke were published in his book called as_______________
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Origin of Species
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Plant Kingdom
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Genera Plantarum
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Micrographia
- Robert Hooke discovered cell in the year 1665. He observed cork cell in the bark of Spanish oak tree under a simple microscope and was able to see the empty structures surrounded by walls and named it a cell.
- He elucidated his observation in a book called "Micrographia.
Hooke observed as boxes or cells in the cork were actually .......... cell.
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Living
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Dead
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Both A and B
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None of these
- Robert Hooke discovered cell in the year 1665. He observed cork cell in the bark of Spanish oak tree under a simple microscope and was able to see the empty structures surrounded by walls and named it a cell.
- He elucidated his observation in a book called "Micrographia". He was unable to see the organelles inside the cell as cork cell which he observed was dead.
The first person to see a cell under the microscope was _______________
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M. Schleiden
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T. Schwann
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R. Hooke
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A. Leeuwenhoek
The invention of the microscope allowed the first view of cells. English physicist and microscopist Robert Hooke (1635–1702) first described cells in 1665. He made thin slices of cork and likened the boxy partitions he observed to the cells (small rooms) in a monastery. The open spaces Hooke observed were empty, but he and others suggested these spaces might be used for fluid transport in living plants. He did not propose, and gave no indication that he believed, that these structures represented the basic unit of living organisms.
Therefore, the correct answer is option C.