Peroxisomes (MP DMAT)
Cellular organelles involved in oxidation reactions, lipid metabolism, and detoxification processes
Questions
Which function(s) do peroxisomes perform exclusively in yeast?
- Glycolysis
- Amine oxidation and assimilation
- Photo-respiration
- Glyoxylate cycle
In yeast and plant cells, long chain fatty acids are oxidised to medium chain fatty acids and then, to CO2 and water in
- peroxisomes and mitochondria
- peroxisomes
- peroxisomes and cytoplasm
- mitochondria
Peroxisomal disorders mainly affect
- endocrine system
- circulatory system
- nervous system
- excretory system
Which peroxisomal enzyme carries out per oxidation reaction?
- Uric acid oxidase
- D-amino acid oxidase
- Acyl CoA oxidase
- Catalase
Peroxisomes play an important role in the absorption of
- vitamin C
- biotin
- vitamin A
- vitamin B1
Which of the following anti-fungal molecules is/are made by peroxisomes to fight fungal penetration in the cell?
- Cerebrosides
- Glucosinolate
- Glycosides
- Plasmalogen
Which of the following peroxisome oxidative enzymes is absent in humans?
- Uric acid oxidase
- D-amino acid oxidase
- Catalase
- Acyl CoA oxidase
Peroxisomes differ from lysosomes in having
- hydrolytic enzymes
- oxidative enzymes
- single membrane
- ligases
Peroxisomes are involved in the digestion of
- polypeptides
- polysaccharides
- fatty acids
- minerals
Which of the following cells contain the largest number of peroxisomes?
- Neural cells
- Liver cells
- Blood cells
- Skin cells
Which of the following statements about peroxisomes is not true?
- Peroxisomes are found in all cell types.
- Peroxisomes are self replicating.
- Peroxisomes oversee reactions that neutralise free radicals.
- Peroxisomes are major sites of oxygen utilisation.
Which scientist first identified peroxisomes as organelles?
- J. Rhodin
- Christian de Duve
- Robert Brown
- Ernest Fullman
Peroxisomes can be derived from
- vacuoles
- golgi bodies
- endoplasmic reticulum
- lysosome
Which of the following is a peroxisomal linked disorder?
- Leigh syndrome
- Myoneurogenic gastrointestinal encephalopathy
- Galactosialidosis
- X-linked adrenoleukodystrophy
Which process is crucial for the export of PEX5 (a peroxin) from peroxisome to cytosol?
- ATP hydrolysis
- Ubiquitination
- Mannose tagging
- Oxidation