Tag: single membrane bound organelles

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Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Microbody present only in plants is

  1. Sphaerosome

  2. Peroxisome

  3. Glyoxysome

  4. Both B and C
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Spherosomes are involved in

  1. Utilisation of alcohol

  2. Storage of fat

  3. Synthesis and storage of fat

  4. Synthesis and storage of carbohydrates
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Microbodies resemble mitochondria in 

  1. Using oxygen

  2. Producing reducing power

  3. Having catalase

  4. Formation of ATP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

New spherosomes develop from

  1. Old sphaerosomes

  2. E.R.

  3. Golgi apparatus

  4. Prospherosomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Organelle covered by a single membrane is

  1. Sphaerosomes

  2. Peroxisomes

  3. Glyoxisomes

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A. Spherosomes or oleosomes can be defined as small cellular organelles found in plant cells that are enclosed by a single membrane. 

B. The peroxisome is a single membrane-bound organelle which contains oxidative enzymes and is responsible for lipid production and oxidation reactions within the cell.
C. Glyoxysomes are specialized peroxisomes found only in plants cells in fat storage tissues of germinating seeds and in filamentous fungi.
So, the correct answer is 'All of the above'.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Enzyme catalase occurs in

  1. Lysosome

  2. Sphaerosome

  3. Peroxisome

  4. Peroxisome and glyoxysome
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Peroxisome was discoverd by

  1. De Duve

  2. Rhodin

  3. De Robertis and Franchi

  4. Beevers
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • 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'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Peroxisomes and glyoxysomes are

  1. Energy transforming organelles

  2. Membrane-less organelles

  3. Macrobodies

  4. Microbodies
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • Peroxisomes and glyoxisomes are microbodies.
  • 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.
  • So, the correct answer is 'Microbodies'.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

The function of peroxisome is

  1. To convert $H _2O _2$ into $H _2O$ and $O _2$
  2. Utilisation of $O _2$ gas

  3. To break toxic molecules of a cell

  4. All the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Peroxisomes are involved in the breakdown of H2O2, the utilization of oxygen in oxidative reactions, and the degradation of various toxic molecules, making all listed functions correct.

Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

Recent researches suggest that peroxisomes have ............ origin.

  1. Cyanobacterial

  2. Fusobacterial

  3. Proteobacterial

  4. Actinobacterial.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Recent research into the evolutionary origin of peroxisomes suggests they may have evolved from an endosymbiotic relationship with actinobacteria.