Tag: structure and function of cell organelles
Questions Related to structure and function of cell organelles
Out of peroxisomes, lysosomes and mitochondria, single membrane covering occurs in
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Both peroxisomes and lysosomes
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Only peroxisomes
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All of the above
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None of the above
- A lysosome is a single membrane-bound organelle which contains digestive enzymes that digest excess or worn out organelles, food particles, engulfed viruses or bacteria and macromolecules.
- The peroxisome is a single membrane-bound organelle which contains oxidative enzymes and is responsible for lipid production and oxidation reactions within the cell.
- Whereas, mitochondria is a double membrane-bound organelle and is known as the powerhouse of the cell which is present in all eukaryotic cells.
- So, the correct answer is 'Both peroxisomes and lysosomes'.
Peroxisomes occur in
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Bundle sheath
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Vascular bundles
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Mesophyll cells
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Endosperm
- The peroxisome is a single membrane-bound organelle which contains oxidative enzymes and is responsible for lipid production and oxidation reactions within the cell.
- Peroxisomes are present in the photosynthetic cells of green plants (palisade cells of C3 plants and bundle sheath cells of C4 plants).
- So, the correct answer is 'Bundle sheath'.
Scientist credited with discovery of sphaerosome is
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Rhodin
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Perner
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Koltzoff
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Claude.
- Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane.
- It is mainly responsible for the storage and synthesis of lipid.
- It was discovered by Perner in the year 1953.
- They are obtained from the endoplasmic reticulum and are surrounded by a phospholipid monolayer.
- So, the correct answer is 'Perner'.
Microbody present only in plants is
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Sphaerosome
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Peroxisome
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Glyoxysome
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Both B and C
- Microbodies or cytosomes can be defined as cellular organelle found in the plant cells, protozoans and animal cells (liver and kidney cells).
- The different types of microbodies present within a cell are peroxisomes, glyoxysomes, glycosomes and hydrogenosomes.
- The main function of microbodies is oxidation of fatty acids, amino acids, purines and alcohol (liver cells) which requires significant amounts of oxygen.
- Glyoxysomes are found only in plants cells in fat storage tissues of germinating seeds and in filamentous fungi.
- So, the correct answer is 'Glyoxysome'.
Spherosomes are involved in
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Utilisation of alcohol
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Storage of fat
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Synthesis and storage of fat
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Synthesis and storage of carbohydrates
- Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane.
- It is mainly responsible for the storage and synthesis of lipid.
- The lipid content in spherosomes is 98% and proteins content is only 2 %.
- They are obtained from the endoplasmic reticulum and are surrounded by a phospholipid monolayer.
- So, the correct answer is 'Synthesis and storage of fat'.
Microbodies resemble mitochondria in
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Using oxygen
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Producing reducing power
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Having catalase
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Formation of ATP
- Microbodies or cytosomes can be defined as cellular organelle found in the plant cells, protozoans and animal cells (liver and kidney cells).
- The different types of microbodies present within a cell are peroxisomes, glyoxysomes, glycosomes and hydrogenosomes.
- The main function of microbodies is oxidation of fatty acids, amino acids, purines and alcohol (liver cells) which requires significant amounts of oxygen.
- Mitochondria are double membrane-bound cellular organelles which are known as the powerhouse of the cell.
- It creates energy-rich molecules (ATP) for the cell by utilizing oxygen.
- So, the correct answer is 'Using oxygen'.
New spherosomes develop from
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Old sphaerosomes
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E.R.
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Golgi apparatus
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Prospherosomes
- Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane.
- It is mainly responsible for the storage and synthesis of lipid.
- They arise from the endoplasmic reticulum and are enclosed by a phospholipid monolayer.
- So, the correct answer is 'E.R'.
Organelle covered by a single membrane is
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Sphaerosomes
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Peroxisomes
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Glyoxisomes
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All of the above
A. Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane.
Enzyme catalase occurs in
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Lysosome
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Sphaerosome
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Peroxisome
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Peroxisome and glyoxysome
- The enzyme catalase occurs in Peroxisome and glyoxysome.
- The enzyme catalase is found all living organisms such as bacteria, plants, and animals.
- Its main function is to catalyze the breakdown of hydrogen peroxide into water and oxygen and thus, protects the cell from oxidative damage from reactive oxygen species.
- The peroxisome is a single membrane-bound organelle which contains oxidative enzymes and is responsible for lipid production and oxidation reactions within the cell.
- Similarly, glyoxysome is specialized peroxisome which is found in fat storage tissues of germinating seeds.
- So, the correct answer is 'Peroxisome and glyoxysome'.
Peroxisome was discoverd by
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De Duve
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Rhodin
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De Robertis and Franchi
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Beevers
- The peroxisome is a single membrane-bound organelle which contains oxidative enzymes and is responsible for lipid production and oxidation reactions within the cell.
- They were discovered by Christian de Duve (Belgian cytologist) in the year 1967.
- So, the correct answer is 'De Duve'.