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

Explain methods for coliform detection in water, Explain Methods for Colifo...

Explain Methods for Coliform Detection in Water? Sanitary condition of drinking water can be determined by counting the coliform bacteria. It is a reliable and reproducible ind

The signals for parturition originate from, The signals for parturition ori...

The signals for parturition originate from: 1. placenta only 2. placenta as well as fully developed foetus 3. oxytocin released from maternal pituitary 4. fully develop

Explain the occurrence of vitamin B1, Explain the Occurrence of Vitamin B 1...

Explain the Occurrence of Vitamin B 1 Vitamin B 1   occurs widely in the vegetable  kingdom. The richest sources for vitamin B 1 , as you may already know, are yeast, grain ge

Organic compounds, ORGANIC COMPOUNDS - They are substances having bo...

ORGANIC COMPOUNDS - They are substances having both carbon and hydrogen which are commonly biological in origin. Organic compounds can be micromolecules or macromolecules

Conduction of impulse, CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXO...

CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXONS - The impulse moves along the axon as local effect by altering the permeability of neighbouring Na +  channels and af

Explain clinical dietetics and diet therapy, Explain Clinical dietetics and...

Explain Clinical dietetics and Diet therapy Clinical dietetics  :  The application of  dietetics  in a hospital or health care institutional  setting. Diet therapy  :

Nutrient requirement during angina pectoris, Q. Nutrient requirement during...

Q. Nutrient requirement during angina pectoris? The nutrient requirement here is the same as discussed earlier, however, to sum up it can be said that we need to restrict calor

Discuss about troponin receptor site, Skeletal muscle A. The myosin hea...

Skeletal muscle A. The myosin head is activated (energized) by the conversion of GTP (that is bound to myosin) to GDP and Pi (that are bound to myosin). B. Detachment of the

The human abo blood type codominant alleles a and b, The human abo blood ty...

The human abo blood type codominant alleles a and b are dominant to O. A man with blood type B and women with blood type A could potentially have children with which of the followi

Hypoglycaemia unawareness, Hypoglycaemia Unawareness ? Some people ...

Hypoglycaemia Unawareness ? Some people with diabetes do not have early warning signs of low blood glucose, a condition called hypoglycemia unawareness. ? This conditio

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