Lysosomes, Biology

Assignment Help:

Lysosomes

  1. Lysosomes are small vesicles which are bounded by a single membrane & contain hydrolytic enzymes in the form of minute crystalline or semi crystalline granules of 5-8 nm.
  2. It is also known as Atom of the cell, Disposal unit, Suicidal bag, Lytic bags, Scavanger of the cell.
  3. Lysosome were first observed by Novikoff.
  4. Discovered by De Duve (1955) in liver cells and called it "Pericanalicular dense bodies"
  5. Novikoff called it Lysosome and he also gave the term GERL = GB + ER + Lysosome. Relation between golgi body, endoplasmic reticulum and lysosomes is known as GERL system.
  6. P. Matile (1964) discovered them in Neurospora. Lysosomes abundantly found in fungi.
  7. Pit and Galpin (1973) confirmed their presence in higher plant cells (Potato stem).
  8. With the exception of mammalian RBC they were reported from all animal cells.
  9. In majority of plant cells large central vacuole functions as Lysosome. So in higher plants lysosomes are less frequent.
  10. Periplasmic space - Space between cell wall and cell membrane in bacteria plays similar role.
  11. Lysosomes are spherical bag like structures (0.1-0.8 m) covered by single unit membrane. They are larger in phagocytes (0.8 to 2 m).
  12. Lysosomes are polymorphic cell organelles.

Related Discussions:- Lysosomes

What do you mean by insect control, Q. What do you mean by Insect control? ...

Q. What do you mean by Insect control? The insects can breed and hide in garbage and other places where there is availability of waste materials. The cockroach lives and breed

What are epithelial tissues, What are epithelial tissues? What are their ge...

What are epithelial tissues? What are their general function and how is that function associated to the features of the tissue? Epithelial tissues, also known as epithelia, are

Describe pulsus parvus et tardus, Describe pulsus parvus et tardus? Pu...

Describe pulsus parvus et tardus? Pulsus parvus et tardus means a slow rising small volume pulse typically in severe aortic stenosis with preserved LV function. Figur

What similarities do birds and reptiles share, What similarities do birds a...

What similarities do birds and reptiles share regarding external coverage, reproduction and excretion? Regarding external coverage, birds are same to reptiles as they present

Effect of water pollution, (i) Effect of Human Health: (a) Mercury co...

(i) Effect of Human Health: (a) Mercury compounds in waste water in converted into methyl mercury by Bacterial action which causes numbness of limbs, lips and tongue, deaf

Man-made disasters- nuclear disasters, Among all the environmental disaster...

Among all the environmental disasters that might be caused by humans, nuclear disasters have the greatest potential of causing severe damage to life property. The released as a con

How many larvae per treatment, A study is made to verify the effects of pes...

A study is made to verify the effects of pesticide exposure on pupal weight of butterflies. In a pilot study, 5 randomly selected larvae are raised on plants exposed to the pestici

Mollusca, 5 classification of mollusco

5 classification of mollusco

Organic substances - abiotic components, Organic Substances - Abiotic Compo...

Organic Substances - Abiotic Components These include carbohydrates, proteins, lipids and their derivatives which are derived from the waste products of plants and animals or

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd