MCQ’S ON PEROXISOMES
1. Which of the following activities are characteristics of peroxisomes?
I. Catalase activity
II. Possess a glyoxylate cycle
III. Degradation of very long-chain fatty acids
IV. Produce dihydrogen
(a) I and II
(b) I and III
(c) III and IV
(d) II and IV
Answer: (b)
2. Pick the odd one out in the context of their surrounding membrane systems.
(a) Nucleus
(b) Chloroplasts
(c) Mitochondria
(d) Endoplasmic reticulum
Answer: (d)
3. Pick the odd one out.
(a) Mitosomes
(b) Glycosomes
(c) Mitochondria
(d) Hydrogenosomes
Answer: (a)
4. Which of the following organelle is involved in lipid metabolism?
(a) RER
(b) SER
(c) Peroxisomes
(d) Golgi apparatus
Answer: (b)
5. Which of the following organelle helps in the penetration of sperm into the egg during fertilization?
(a) Peroxisome
(b) nucleus
(c) Lysosome
(d) mitochondrion
Answer: (c)
6. Inside the cell, H2O2 clearance is brought about by______.
(a) Peroxisome with enzyme amino oxidase
(b) Glyoxysome with the enzyme catalase
(c) Peroxisome with the enzyme catalase
(d) Glyoxysome with enzyme isocitrate lyase
Answer: (c)
7. Organelle – Glyoxysomes is involved in _____.
(a) Conversion of fatty acids to lipids
(b) Conversion of amino acids to proteins
(c) Conversion of amino acids to carbohydrates
(d) Conversion of fatty acids to carbohydrates
Answer: (d)
8. _______ forms the crystalline core inside the peroxisome.
(a) Salt crystals
(b) collection of phospholipids
(c) highly condensed oxidative enzymes
(d) Condensed ammonium chloride
Answer: (c)
9. What is the group of proteins in the peroxisomal membrane called?
(a) Peroxins
(b) Transporters
(c) Translocation proteins
(d) Peroxisomal membrane proteins
Answer: (a)
10. Which of the following embedded enzyme in the peroxisomal membrane is involved to in the activation of fatty acids before the beta-oxidation?
(a) Fatty acid dehydrogenase
(b) 3-ketothiolase
(c) Acyl- CoA oxidase
(d) Acyl – CoA synthase
Answer: (d)
