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 is the life cycle of the gymnosperms, What is the life cycle of the gy...

What is the life cycle of the gymnosperms? As all plants they show a diplobiontic life cycle, i.e., alternation of generations with diploid and haploid stages. The lasting (fin

How can the enzymes be classified, How can the enzymes be classified? Expla...

How can the enzymes be classified? Explain giving examples. Based on structure, enzymes can be classified into monomeric enzymes and oligomeric compounds. Monomeric enzym

Types of passive transport, Simple diffusion Only comparatively small u...

Simple diffusion Only comparatively small uncharged or hydrophobic molecules (H2O, O2, and CO2, other gases, urea and ethanol)   cross   the lipid   bilayer   through simple

Explain the effect on minerals of the human milk, Explain the effect on Min...

Explain the effect on Minerals of the Human milk? There appears to be no relationship between dietary intake and concentrations in milk for copper, iron or zinc. Iron supplemen

Explain the genioglossus, Genioglossus Originates from superior genial ...

Genioglossus Originates from superior genial tubercles which are located near the crest of the alveolar ridge in atrophic mandible. Therefore, one should be aware of it during

Determine push-ups test for check the body strength, Determine Push-ups Tes...

Determine Push-ups Test for check the Body Strength? Push-ups is another test done to measure muscular strength, as well as, endurance and done on a parallel bar. The subject

Genetics, polymorphism and its causes

polymorphism and its causes

Explain dietetics, Explain Dietetics Dietetics  has been defined as  t...

Explain Dietetics Dietetics  has been defined as  the science and art of feeding individuals based  on the principles of  nutrition. It can also be  said  to  be  the "science

Attempted suicide - psychiatric emergencies, Attempted Suicide: Suicid...

Attempted Suicide: Suicide and homicide represent major source of morbidity and mortality in psychiatric practice.  Suicide means killing of  oneself.  An attempted suicide is

Zoonotic diseases-classification in terms of reservoir host, Classification...

Classification in terms of reservoir host 1.  Anthropozoonoses: Infections transmitted from lower vertebrate to man, e.g., rabies, plague, leptospirosis, etc. 2.   Zooanthro

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