23. Peroxisomes Flashcards
What are peroxisomes? What is shape? How many peroxisomes are there in a cell? What’s it’s size? Is it membranous? What’s it’s core called? What is the core called in the microperoxisomes? What kind of plate is it attached to sometimes?
Peroxisomes are sites for oxygen utilisation. It’s shape is spherical. It varies but it’s generally between 70-100 peroxisomes per cell. The size varies there’s macroperoxisomes which are smaller and there’s also microperoxisomes which are bigger. It’s a membranous organelle with one single layer. It’s core is the homogeneous matrix. The core microperoxisomes is a Crystalloid core or a nucleoid. Sometimes there’s a marginal plate attached to the peroxisome.
How many enzymes does the peroxisome have? Can you name some of them?
Functions
What is it a compartment for? What does is it decompose? What does it do with H2O2? What kind of molecules does it degrade? Is it involved in any biosynthesis? Is it involved with any kind of respiration?
The peroxisome has more than 50 enzymes. It has an enzyme called catalase witch composes around 40% of an peroxisome. It also has peroxidase, beta oxydase, D and L amino oxydase and urate oxydase.
The peroxisome is a compartment for oxidation reactions. Its a site for decomposing harmful substances. It decomposes H2O2 to H2O and O2 and eliminates it from the cell. It degrades toxic molecules and prescription drugs. It is involved in lipid biosynthesis. It plays an important role in cellular respiration.
