Tag: microbodies

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Questions Related to microbodies

Multiple choice bio-chemistry life processes in living organisms- part 1 microbodies living organisms and energy production single membrane bound organelles

Which of the following is a phosphoryalting unit?

  1. Oxysome

  2. Vaculoes

  3. Peroxisome

  4. Mitochondria
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxysomes are found in inner mitochondrial membrane and also called ad $F _1$ or elementary particles. It contains enzymes ATP synthase responsible for synthesis of ATP. They act as phosphorylating unit.

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

Which one of the following is not considered as a part of the endomembrane system of eukaryotic cells?

  1. ER

  2. Lysosome and vacuoles

  3. Golgi complex

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

Endomembrane system of a eukaryotic cell is a membrane system that involves flow of membranes from one component to another by means of small membrane vesicles. The endomembrane system of a eukaryotic cell consists of endoplasmic reticulum, Golgi apparatus, lysosomes and plasma membrane.

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

Which is not true about spherosomes?

  1. Arise from ER.

  2. Related to fat.

  3. Single membrane bound structure.

  4. Involved in photorespiration.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Spherosomes are membrane covered small spherical organelles which synthesize and store fats. They develop from endoplasmic reticulum. In some plants, spherosomes have lysosomal activity, e.g., maize root tip.

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

Urate oxidase occurs in

  1. Lomasomes

  2. Peroxisomes

  3. Mitochondria

  4. Glyoxysomes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include :
(a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase.
(b) Peroxide destroying enzymes like catalase. 

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. H$ _2$O$ _2$ destruction

  2. Conversion of fats to carbohydrates

  3. Detoxification of heavy metals

  4. Oxidative phosphorylation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Peroxisomes are single membrane covered cell organelles which take part in oxidation reactions other than those of respiration. Peroxisomes are microbodies which have enzymes for peroxide biosynthesis like peroxidases, amino acid oxidase and peroxide destruction like catalase.

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

What is degraded by peroxisomes?

  1. Carbon dioxide

  2. Hydrogen peroxide

  3. Lithium oxide

  4. Carbon monoxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include : (a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase and (b) peroxide destroying enzymes like catalase.
Peroxisomes occur widely in animals cells, protists, fungi, higher plants but quite common in photosynthetic cells. In mesophyll cells, peroxisomes interact with chloroplasts, and mitochondria to take part in photorespiration.

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

Peroxisomes, in plant cells, are involved in

  1. Photooxidation

  2. Photorespiration

  3. Photophosphorylation

  4. Photolysis of water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include :
(a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase and (b) Peroxide destroying enzymes like catalase.
Peroxisomes occur widely in animals cells, protists, fungi, higher plants but quite common in photosynthetic cells. In mesophyll cells, peroxisomes interact with chloroplasts, and mitochondria to take part in photorespiration.
Multiple choice bio-chemistry structure and function of cell organelles microbodies living organisms and energy production single membrane bound organelles

DNA remains absent in

  1. Chloroplast

  2. Nucleus

  3. Peroxisomes

  4. Chromosomes
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include :

(a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase and (b) Peroxide destroying enzymes like catalase. 
Peroxisomes do not have DNA. DNA is present in nucleus and some cell organelles like chloroplast and mitochondria.

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

Microbodies are minute vesicles and are present in

  1. Plant cells only

  2. Animal cells only

  3. Prokaryotic cells only

  4. Both plant and animal cells
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Microbodies are a type of organelles that are found in both plant and animal cells. The organelles in the microbody family include peroxisomes, glyoxysomes, glycosomes and hydrogenosomes. In vertebrates, microbodies are especially prevalent in the liver and kidney organs.
So, the correct answer is 'Both plant and animal cells'.